Use canonical paths for editor and fix route transitions

- replace textarea editor with CodeMirror and syntax highlighting\n- integrate editor mode header (save button, hide unused controls)\n- fix breadcrumb/editor navigation behavior and transitions\n- add Create File action with ghost-rename flow and auto-open in editor\n- refine create-file icon shape and plus cutout alignment

cista/__main__.py

@@ -185,7 +185,9 @@ def _resolve_confdir(args):
 
 def _confdir(args):
     confdir = _resolve_confdir(args)
-    config.init_confdir(confdir)
+    if confdir is not None:
+        os.environ["CISTA_HOME"] = confdir.as_posix()
+    config.init_confdir()
 
 
 def _user(args):

cista/app.py

@@ -148,12 +148,16 @@ async def main_after_start(app):
 # Sanic sometimes fails to execute after_server_stop, so we do it before instead (potentially interrupting handlers)
 @app.before_server_stop
 async def main_stop(app):
-    watching.stop(app)
-    await onlyoffice.close_oo_client()
-    await shutdown_preview_workers()
-    app.ctx.threadexec.shutdown()
-    app.ctx.zipexec.shutdown(cancel_futures=True)
-    await sso.close_client()
+    async with asyncio.TaskGroup() as tg:
+        tg.create_task(asyncio.to_thread(watching.stop, app))
+        tg.create_task(onlyoffice.close_oo_client())
+        tg.create_task(shutdown_preview_workers())
+        tg.create_task(sso.close_client())
+
+    async with asyncio.TaskGroup() as tg:
+        tg.create_task(asyncio.to_thread(app.ctx.threadexec.shutdown))
+        tg.create_task(asyncio.to_thread(app.ctx.zipexec.shutdown, cancel_futures=True))
+
     logger.debug("Cista worker threads all finished")
 
 

cista/auth.py

@@ -574,6 +574,13 @@ def _basic_auth_login(request):
     if username == "token":
         token = config.config.tokens.get(password)
         if token:
+            if _allow_anonymous_share_token(token):
+                request.ctx.session = None
+                request.ctx.username = None
+                request.ctx.user = None
+                request.ctx.auth_token_id = password
+                request.ctx.auth_token = token
+                return None
             user = config.config.users.get(token.username)
             if user:
                 request.ctx.session = None
@@ -873,14 +880,16 @@ async def verify(request, *, privileged=False):
     """
     hydrate_request_auth_context(request, source="auth.verify")
 
-    # Public mode: skip auth unless privileged access is required
-    if config.config.public and not privileged:
-        return
-
     auth_header = request.headers.get("authorization", "")
     has_auth_header = bool(auth_header)
     scheme = auth_header.split()[0].lower() if has_auth_header else None
 
+    # Public mode: skip auth unless privileged access is required.
+    # Still parse explicit Authorization headers so share-token URLs can
+    # activate share scoping even while public access is enabled.
+    if config.config.public and not privileged and not has_auth_header:
+        return
+
     # Concise auth flow for diagnostics (populated by use_session + verify)
     auth_flow = list(getattr(request.ctx, "auth_flow", ["session:skipped"]))
     tried: list[str] = []
@@ -941,6 +950,13 @@ async def verify(request, *, privileged=False):
                             quiet=True,
                         )
                     return
+                token = request_share_token(request)
+                if (
+                    token is not None
+                    and _allow_anonymous_share_token(token)
+                    and not privileged
+                ):
+                    return
         elif scheme in ("ntlm", "negotiate"):
             tried.append("ntlm")
             try:
@@ -1275,6 +1291,19 @@ def _token_belongs_to_user(token, username, sso_user_id):
     return bool(sso_user_id is not None and token.sso_user_id == sso_user_id)
 
 
+def _is_anonymous_share_token(token: config.Token) -> bool:
+    return (
+        sharefs.is_share_token(token)
+        and not token.username
+        and not token.sso_user_id
+    )
+
+
+def _allow_anonymous_share_token(token: config.Token) -> bool:
+    # Anonymous share links are intentionally coupled to public mode.
+    return config.config.public and _is_anonymous_share_token(token)
+
+
 def request_token(request) -> config.Token | None:
     token = getattr(request.ctx, "auth_token", None)
     return token if isinstance(token, config.Token) else None
@@ -1439,10 +1468,11 @@ async def create_share_token_handler(request):
             raise BadRequest("Could not determine SSO user")
     else:
         username = current_username or ""
-        if not username:
+        if username:
+            if username not in config.config.users:
+                raise BadRequest("User does not exist")
+        elif not config.config.public:
             raise BadRequest("Could not determine user")
-        if username not in config.config.users:
-            raise BadRequest("User does not exist")
 
     token = secrets.token_urlsafe(12)
     changes = {

cista/config.py

@@ -63,10 +63,10 @@ config: Config
 conffile: Path
 
 
-def init_confdir(confdir: Path | str | None = None) -> None:
+def init_confdir() -> None:
     global conffile
-    if confdir is not None:
-        home = Path(confdir).expanduser()
+    if p := os.environ.get("CISTA_HOME"):
+        home = Path(p)
     else:
         xdg = os.environ.get("XDG_CONFIG_HOME")
         home = (

cista/fileio.py

@@ -1,9 +1,11 @@
+import errno
 import os
 import threading
 from pathlib import Path
 
 from cista import config
 from cista.util import filename
+from cista.util.diskspace import InsufficientStorageError, check_free_space
 from cista.util.lrucache import LRUCache
 
 
@@ -34,13 +36,24 @@ class File:
             self.open_rw()
         if self.fd is None:
             raise RuntimeError("file descriptor is not available for write")
+        check_free_space(self.path)
         if file_size is not None:
             if pos + len(buffer) > file_size:
                 raise ValueError("write exceeds declared file size")
-            os.ftruncate(self.fd, file_size)
+            try:
+                os.ftruncate(self.fd, file_size)
+            except OSError as e:
+                if e.errno == errno.ENOSPC:
+                    raise InsufficientStorageError("No space left on device") from e
+                raise
         if buffer:
             os.lseek(self.fd, pos, os.SEEK_SET)
-            os.write(self.fd, buffer)
+            try:
+                os.write(self.fd, buffer)
+            except OSError as e:
+                if e.errno == errno.ENOSPC:
+                    raise InsufficientStorageError("No space left on device") from e
+                raise
 
     def __getitem__(self, slc):
         if self.fd is None:

cista/fileserver.py

@@ -1,5 +1,6 @@
 import asyncio
 import contextlib
+import errno
 import mimetypes
 import os
 import re
@@ -12,11 +13,12 @@ from urllib.parse import unquote, urlparse
 from wsgiref.handlers import format_date_time
 
 from sanic import Blueprint, HTTPResponse, empty, json
-from sanic.exceptions import BadRequest, NotFound
+from sanic.exceptions import BadRequest, NotFound, SanicException
 
 from cista import auth, config, sharefs, watching
 from cista.api import fileserver
 from cista.util import filename
+from cista.util.diskspace import InsufficientStorageError
 
 bp = Blueprint("fileserver", url_prefix="/files")
 
@@ -52,13 +54,22 @@ async def upload_file_chunk(request, name):
 
     rel, path = _safe_relpath(name, request=request)
     rel_name = rel.as_posix()
-    upload_info = await asyncio.to_thread(
-        fileserver.upload_info,
-        rel_name,
-        start,
-        body,
-        total,
-    )
+    try:
+        upload_info = await asyncio.to_thread(
+            fileserver.upload_info,
+            rel_name,
+            start,
+            body,
+            total,
+        )
+    except InsufficientStorageError as e:
+        raise SanicException(str(e), status_code=507, quiet=True) from e
+    except OSError as e:
+        if e.errno == errno.ENOSPC:
+            raise SanicException(
+                "No space left on device", status_code=507, quiet=True
+            ) from e
+        raise
     extras = []
     chunk_len = end - start
     whole_file = start == 0 and end == total

cista/onlyoffice.py

@@ -129,7 +129,9 @@ def log_reachable_info() -> None:
 
 def setup_docker(confdir: Path | None = None) -> int:
     """Build and run the patched OnlyOffice Docker image."""
-    config.init_confdir(confdir)
+    if confdir is not None:
+        os.environ["CISTA_HOME"] = confdir.as_posix()
+    config.init_confdir()
     if config.conffile.exists():
         config.load_config()
     else:

cista/preview.py

@@ -20,7 +20,8 @@ from sanic import Blueprint, empty, raw, redirect
 from sanic.exceptions import NotFound
 from sanic.log import logger
 
-from cista import auth, config, onlyoffice, sharefs
+from cista import auth, config, onlyoffice, sharefs, watching
+from cista.fileio import fuid
 from cista.preview_worker import (
     DOC_PREVIEW_SUFFIXES,
     OFFICE_PREVIEW_SUFFIXES,
@@ -244,7 +245,12 @@ class _PreviewWorkerPool:
                     args[0].name,
                 )
                 if not future.done():
-                    future.set_exception(PreviewTimeoutError(args[0].name))
+                    future.set_exception(
+                        PreviewTimeoutError(
+                            args[0].name,
+                            backend=_expected_preview_backend(args[0]),
+                        )
+                    )
                 continue
 
             filepath = args[0]
@@ -258,11 +264,13 @@ class _PreviewWorkerPool:
                     future.set_result((out, resp))
             except TimeoutError:
                 replace = True
-                logger.warning(
-                    "Preview timeout (%ds) for %s", int(PREVIEW_TIMEOUT), filepath.name
-                )
                 if not future.done():
-                    future.set_exception(PreviewTimeoutError(filepath.name))
+                    future.set_exception(
+                        PreviewTimeoutError(
+                            filepath.name,
+                            backend=_expected_preview_backend(filepath),
+                        )
+                    )
             except WorkerChecksumError:
                 replace = True
                 logger.error("Preview checksum mismatch for %s", filepath.name)
@@ -410,6 +418,10 @@ async def verify_preview(request):
 class PreviewTimeoutError(Exception):
     """Raised when the preview subprocess exceeds PREVIEW_TIMEOUT."""
 
+    def __init__(self, message: str, *, backend: str | None = None):
+        super().__init__(message)
+        self.backend = backend
+
 
 class PreviewError(Exception):
     """Raised when the preview subprocess exits with a non-zero status."""
@@ -466,11 +478,13 @@ class OOConversionManager:
                     filepath, request_timeout=5.0
                 )
         except Exception as e:
-            future.set_exception(e)
+            if not future.done():
+                future.set_exception(e)
             async with self._lock:
                 self._in_flight.pop(key, None)
         else:
-            future.set_result(png_bytes)
+            if not future.done():
+                future.set_result(png_bytes)
             async with self._lock:
                 self._in_flight.pop(key, None)
 
@@ -548,6 +562,21 @@ def _preview_job_priority(path) -> int:
     return 4
 
 
+def _expected_preview_backend(path: Path) -> str:
+    """Best-effort backend label used for timeout/access logging."""
+    suffix = path.suffix.lower()
+    if suffix in OFFICE_PREVIEW_SUFFIXES:
+        return "onlyoffice"
+    if suffix in DOC_PREVIEW_SUFFIXES:
+        return "pdf"
+    mime_type, _ = mimetypes.guess_type(path.name)
+    if mime_type and mime_type.startswith("video/"):
+        return "video"
+    if mime_type and mime_type.startswith("image/"):
+        return "pyvips"
+    return "preview"
+
+
 def is_previewable_path(path) -> bool:
     suffix = path.suffix.lower()
     if suffix in DOC_PREVIEW_SUFFIXES or suffix in OFFICE_PREVIEW_SUFFIXES:
@@ -609,10 +638,12 @@ async def preview(req, path):
                 timeout=PREVIEW_TIMEOUT,
             )
     except TimeoutError:
-        logger.warning("Preview timeout for %s", filepath)
+        req.ctx.log_extra = f"{_expected_preview_backend(filepath)} timeout"
         return empty(503)
-    except PreviewTimeoutError:
-        logger.warning("Preview worker timeout for %s", filepath)
+    except PreviewTimeoutError as e:
+        req.ctx.log_extra = (
+            f"{(e.backend or _expected_preview_backend(filepath))} timeout"
+        )
         return empty(503)
     except httpx.HTTPStatusError:
         req.ctx.log_extra = "onlyoffice N/A"
@@ -654,6 +685,12 @@ async def preview(req, path):
         # Preview generation failed, redirect to the file itself
         return redirect(f"/files/{path}", status=303)
 
+    # Store aspect ratio if the worker returned dimensions
+    if preview_resp and preview_resp.width and preview_resp.height:
+        ar = round(preview_resp.height / preview_resp.width, 2)
+        fuid_str = fuid(stat)
+        watching.notify_ar(fuid_str, ar)
+
     # Build headers and cache the full response
     preview_mime = (
         preview_resp.mime

cista/preview_worker.py

@@ -17,6 +17,7 @@ import gc
 import io
 import logging
 import mimetypes
+import shlex
 import struct
 import subprocess
 import sys
@@ -95,6 +96,8 @@ class PreviewResponse(msgspec.Struct, omit_defaults=True):
     timings: list[float] | None = None
     error: str | None = None
     stderr: str | None = None
+    width: int | None = None
+    height: int | None = None
 
 
 _enc = msgspec.json.Encoder()
@@ -173,6 +176,7 @@ def _get_image_dimensions(path: Path) -> tuple[int, int] | None:
     """
     try:
         img = pyvips.Image.new_from_file(str(path))
+        img = img.autorot()
     except pyvips.error.Error:
         return None
     else:
@@ -214,7 +218,18 @@ def _image_via_ffmpeg(path: Path, maxsize: int, quality: int) -> bytes:
             cmd.insert(4, "-s")
             cmd.insert(5, f"{new_w}x{new_h}")
     try:
-        subprocess.run(cmd, capture_output=True, check=True, shell=False)  # noqa: S603
+        try:
+            subprocess.run(cmd, capture_output=True, check=True, shell=False)  # noqa: S603
+        except subprocess.CalledProcessError as e:
+            shell_cmd = shlex.join(cmd)
+            stderr = (e.stderr or b"").decode(errors="replace").strip()
+            if stderr:
+                raise RuntimeError(
+                    f"ffmpeg failed (exit {e.returncode}): {shell_cmd}\n{stderr}"
+                ) from e
+            raise RuntimeError(
+                f"ffmpeg failed (exit {e.returncode}): {shell_cmd}"
+            ) from e
         with Path(tmp_path).open("rb") as f:
             return f.read()
     finally:
@@ -228,6 +243,8 @@ def process_image_pyvips(path, *, maxsize, quality):
     # HEIC/HEIF: ffmpeg handles tile assembly and HDR correctly;
     # skip pyvips entirely.
     if suffix in (".heic", ".heif"):
+        heic_dims = _get_image_dimensions(path)
+        width, height = heic_dims or (None, None)
         ret = _image_via_ffmpeg(path, maxsize, quality)
         t_end = perf_counter()
         return ret, PreviewResponse(
@@ -235,13 +252,17 @@ def process_image_pyvips(path, *, maxsize, quality):
             mime="image/avif",
             backend="ffmpeg",
             timings=[round((t_end - t_start) * 1000, 1)],
+            width=width,
+            height=height,
         )
 
     # Other image formats: pyvips first, ffmpeg fallback.
     load_opts = {"access": "sequential"}
+    orig_w = orig_h = None
     try:
         img = pyvips.Image.new_from_file(str(path), **load_opts)
         img = img.autorot()
+        orig_w, orig_h = img.width, img.height
         scale = min(maxsize / img.width, maxsize / img.height, 1.0)
         if scale < 1.0:
             img = img.resize(scale)
@@ -253,6 +274,7 @@ def process_image_pyvips(path, *, maxsize, quality):
         )
         backend = "pyvips"
     except pyvips.error.Error:
+        orig_w, orig_h = None, None
         ret = _image_via_ffmpeg(path, maxsize, quality)
         backend = "ffmpeg"
     t_end = perf_counter()
@@ -262,6 +284,8 @@ def process_image_pyvips(path, *, maxsize, quality):
         mime="image/avif",
         backend=backend,
         timings=[round((t_end - t_start) * 1000, 1)],
+        width=orig_w,
+        height=orig_h,
     )
 
 
@@ -270,6 +294,7 @@ def process_image_buffer(data: bytes, *, quality, maxsize, maxzoom):
     t_start = perf_counter()
     img = pyvips.Image.new_from_buffer(data, "")
     img = img.autorot()
+    orig_w, orig_h = img.width, img.height
     scale = min(maxsize / img.width, maxsize / img.height, 1.0)
     if scale < 1.0:
         img = img.resize(scale)
@@ -286,6 +311,8 @@ def process_image_buffer(data: bytes, *, quality, maxsize, maxzoom):
         mime="image/avif",
         backend="pyvips",
         timings=[round((t_end - t_start) * 1000, 1)],
+        width=orig_w,
+        height=orig_h,
     )
 
 
@@ -315,6 +342,8 @@ def process_pdf(path, *, maxsize, maxzoom, quality, page_number=0):
             round((t_load_end - t_load_start) * 1000, 1),
             round((t_save_end - t_save_start) * 1000, 1),
         ],
+        width=round(w),
+        height=round(h),
     )
 
 
@@ -347,6 +376,11 @@ def process_video(path, *, maxsize, quality):
             raise RuntimeError("No frames found in video")
 
         # Resize frame to thumbnail size
+        # Capture display dimensions before resize (accounting for rotation)
+        disp_w = frame.width
+        disp_h = frame.height
+        if frame.rotation in (90, 270):
+            disp_w, disp_h = disp_h, disp_w
         if frame.width > maxsize or frame.height > maxsize:
             scale_factor = min(maxsize / frame.width, maxsize / frame.height)
             new_width = int(frame.width * scale_factor)
@@ -442,6 +476,8 @@ def process_video(path, *, maxsize, quality):
             round((t_load_end - t_load_start) * 1000, 1),
             round((t_save_end - t_save_start) * 1000, 1),
         ],
+        width=disp_w,
+        height=disp_h,
     )
     del imgdata, istream, ostream, icc, occ, frame
     gc.collect()

cista/protocol.py

@@ -12,7 +12,7 @@ class ErrorMsg(msgspec.Struct):
 ## Directory listings
 
 
-class FileEntry(msgspec.Struct, array_like=True, frozen=True):
+class FileEntry(msgspec.Struct, array_like=True, frozen=True, omit_defaults=True):
     level: int
     name: str
     key: str
@@ -20,6 +20,7 @@ class FileEntry(msgspec.Struct, array_like=True, frozen=True):
     size: int
     allocated: int
     isfile: int
+    ar: float | None = None
 
     def __str__(self):
         return self.key or "FileEntry()"

cista/sanic_logging.py

@@ -1,6 +1,7 @@
 """Custom access logging middleware for Sanic."""
 
 import logging
+import os
 import sys
 import unicodedata
 from ipaddress import IPv6Address
@@ -9,6 +10,40 @@ from sanic.log import LOGGING_CONFIG_DEFAULTS
 
 logger = logging.getLogger("cista.access")
 
+
+class ReentrantSafeStreamHandler(logging.StreamHandler):
+    """Stream handler that degrades gracefully on signal-time reentrant writes.
+
+    Python's buffered text streams are not reentrant. If a signal handler logs
+    while another log write is in progress, StreamHandler.emit can raise:
+    RuntimeError("reentrant call inside <_io.BufferedWriter ...>")
+
+    Instead of letting logging emit a long "--- Logging error ---" traceback,
+    we fall back to a best-effort os.write to the same file descriptor.
+    """
+
+    def emit(self, record: logging.LogRecord) -> None:
+        msg = ""
+        try:
+            msg = self.format(record)
+            stream = self.stream
+            stream.write(msg + self.terminator)
+            self.flush()
+        except RuntimeError as exc:
+            if "reentrant call inside" not in str(exc):
+                self.handleError(record)
+                return
+            stream = self.stream
+            fd = stream.fileno()
+            encoding = getattr(stream, "encoding", None) or "utf-8"
+            data = (msg + self.terminator).encode(encoding, errors="replace")
+            os.write(fd, data)
+        except RecursionError:
+            raise
+        except Exception:
+            self.handleError(record)
+
+
 _RESET = "\033[0m"
 _STATUS_INFO = "\033[32m"  # 1xx (green)
 _STATUS_OK = "\033[1;92m"  # 2xx (bright green)
@@ -236,7 +271,7 @@ def log_ws_close(
 
 def configure_access_logging() -> None:
     """Configure the cista.access logger to output to stderr."""
-    handler = logging.StreamHandler(sys.stderr)
+    handler = ReentrantSafeStreamHandler(sys.stderr)
     handler.setFormatter(logging.Formatter("%(message)s"))
     logger.addHandler(handler)
     logger.setLevel(logging.INFO)
@@ -271,6 +306,10 @@ def configure_main_logging() -> None:
     Patches LOGGING_CONFIG_DEFAULTS so the formatter survives every dictConfig
     call Sanic makes during serve_single() / serve().
     """
+    for handler_name in ("console", "error_console", "access_console"):
+        LOGGING_CONFIG_DEFAULTS["handlers"][handler_name]["class"] = (
+            "cista.sanic_logging.ReentrantSafeStreamHandler"
+        )
     LOGGING_CONFIG_DEFAULTS["formatters"]["generic"] = {
         "class": "cista.sanic_logging._EmojiFormatter",
     }

cista/serve.py

@@ -4,11 +4,17 @@ from pathlib import Path
 
 from fastapi_vue.hostutil import parse_endpoint
 from sanic import Sanic
+from sanic.worker.loader import AppLoader
 
 from cista import config, server80
 from cista.app import app
 
 
+def load_app() -> Sanic:
+    """Return the app instance for spawned Sanic worker/reloader processes."""
+    return app
+
+
 def run(*, dev=False):
     """Run Sanic main process that spawns worker processes to serve HTTP requests."""
     _url, opts = parse_listen(config.config.listen)
@@ -29,7 +35,7 @@ def run(*, dev=False):
         access_log=False,
     )  # type: ignore[call-arg]
     if dev:
-        Sanic.serve()
+        Sanic.serve(app_loader=AppLoader(factory=load_app))
     else:
         Sanic.serve_single()
 

cista/util/apphelpers.py

@@ -2,6 +2,7 @@ import time
 from functools import wraps
 
 import msgspec
+import websockets.exceptions
 from sanic import errorpages
 from sanic.exceptions import SanicException
 from sanic.log import logger
@@ -67,6 +68,12 @@ def websocket_wrapper(handler):
         try:
             await auth.verify(request)
             await handler(request, ws, *args, **kwargs)
+        except (
+            websockets.exceptions.ConnectionClosedOK,
+            websockets.exceptions.ConnectionClosedError,
+        ):
+            # Normal websocket closure - already logged in access log
+            pass
         except Exception as e:
             context, code, message = {}, 500, str(e) or "Internal Server Error"
             if isinstance(e, SanicException):

cista/util/diskspace.py

@@ -0,0 +1,49 @@
+import shutil
+import threading
+import time
+from pathlib import Path
+
+MIN_FREE_BYTES = 128 * 1024 * 1024
+_CHECK_CACHE_TTL = 1.0
+
+
+class InsufficientStorageError(Exception):
+    """Raised when there is not enough disk space for an operation."""
+
+
+_cache: dict[Path, tuple[float, int]] = {}
+_lock = threading.Lock()
+
+
+def check_free_space(path: Path) -> None:
+    """Raise InsufficientStorageError if free space on the filesystem containing *path*
+
+    is below MIN_FREE_BYTES. Results are cached per directory for 1 second.
+    """
+    check_path = path.parent if path.parent.exists() else path
+    check_path = check_path.resolve()
+
+    now = time.monotonic()
+    with _lock:
+        ts, free = _cache.get(check_path, (0, 0))
+        if now - ts < _CHECK_CACHE_TTL:
+            if free < MIN_FREE_BYTES:
+                raise InsufficientStorageError(
+                    f"Insufficient storage: {free} bytes free, "
+                    f"need at least {MIN_FREE_BYTES} bytes"
+                )
+            return
+
+    try:
+        free = shutil.disk_usage(check_path).free
+    except OSError as e:
+        raise InsufficientStorageError(f"Cannot check disk usage: {e}") from e
+
+    with _lock:
+        _cache[check_path] = (now, free)
+
+    if free < MIN_FREE_BYTES:
+        raise InsufficientStorageError(
+            f"Insufficient storage: {free} bytes free, "
+            f"need at least {MIN_FREE_BYTES} bytes"
+        )

cista/watching.py

@@ -9,7 +9,6 @@ from os import stat_result
 from pathlib import Path, PurePosixPath
 from stat import S_ISDIR, S_ISREG
 
-import inotify.adapters
 import msgspec
 from natsort import humansorted, natsort_keygen, ns
 from sanic.log import logger
@@ -18,6 +17,11 @@ from cista import config
 from cista.fileio import fuid
 from cista.protocol import FileEntry, Space, UpdDel, UpdIns, UpdKeep
 
+try:
+    import inotify.adapters as inotify_adapters
+except Exception:
+    inotify_adapters = None
+
 # Platform-specific allocated size calculation
 if sys.platform == "win32":
     import ctypes
@@ -55,6 +59,10 @@ class FormatUpdateLoopError(RuntimeError):
     pass
 
 
+class _WatcherStoppingError(Exception):
+    """Internal control-flow exception for quick watcher shutdown."""
+
+
 class State:
     def __init__(self):
         self.lock = threading.RLock()
@@ -154,6 +162,17 @@ stop_event = threading.Event()
 # Thread-safe queue for signaling path updates from websockets
 _update_queue: queue.Queue[PurePosixPath] = queue.Queue()
 
+# Thread-safe queue for AR updates from the preview worker
+_ar_queue: queue.Queue[tuple[str, float]] = queue.Queue()
+
+# AR map: fuid -> aspect ratio (height/width). Written only by the watcher thread.
+_ar_map: dict[str, float] = {}
+
+
+def notify_ar(fuid_key: str, ar: float) -> None:
+    """Called from preview handler to update the AR for a file."""
+    _ar_queue.put_nowait((fuid_key, ar))
+
 
 def notify_change(*paths: PurePosixPath | str):
     """Signal that paths have changed. Called from control/upload websockets."""
@@ -186,14 +205,16 @@ def walk(rel: PurePosixPath, stat: stat_result | None = None) -> list[FileEntry]
         except Exception:
             logger.exception(f"get_allocated_size failed for {path}")
             allocated = st.st_size if isfile else 0
+        key = fuid(st)
         entry = FileEntry(
             level=len(rel.parts),
             name=rel.name,
-            key=fuid(st),
+            key=key,
             mtime=int(st.st_mtime),
             size=st.st_size if isfile else 0,
             allocated=allocated,
             isfile=isfile,
+            ar=_ar_map.get(key) if isfile else None,
         )
         if isfile:
             return [entry]
@@ -202,7 +223,7 @@ def walk(rel: PurePosixPath, stat: stat_result | None = None) -> list[FileEntry]
         li = []
         for f in path.iterdir():
             if stop_event.is_set():
-                raise SystemExit("quit")
+                raise _WatcherStoppingError
             if f.name.startswith("."):
                 continue  # No dotfiles
             with suppress(FileNotFoundError):
@@ -214,7 +235,11 @@ def walk(rel: PurePosixPath, stat: stat_result | None = None) -> list[FileEntry]
                 li.append((int(isfile), f.name, s))
         # Build the tree as a list of FileEntries
         for [_, name, s] in humansorted(li):
+            if stop_event.is_set():
+                raise _WatcherStoppingError
             sub = walk(rel / name, stat=s)
+            if not sub:
+                continue
             child = sub[0]
             entry = FileEntry(
                 level=entry.level,
@@ -644,10 +669,13 @@ DEBOUNCE_MAX = 0.1  # But no more than 100ms total
 
 def watcher(loop):
     """Unified watcher thread handling inotify, websocket signals, and periodic scans."""
-    use_inotify = sys.platform == "linux"
+    use_inotify = sys.platform == "linux" and inotify_adapters is not None
     inotify_tree = None
     modified_flags = frozenset()
 
+    if sys.platform == "linux" and inotify_adapters is None:
+        logger.warning("inotify unavailable; falling back to periodic scanning")
+
     if use_inotify:
         modified_flags = frozenset(
             (
@@ -663,10 +691,13 @@ def watcher(loop):
 
     while not stop_event.is_set():
         if use_inotify:
-            inotify_tree = inotify.adapters.InotifyTree(rootpath.as_posix())
+            inotify_tree = inotify_adapters.InotifyTree(rootpath.as_posix())
 
         # Initialize the tree from filesystem
-        update_root(loop)
+        try:
+            update_root(loop)
+        except _WatcherStoppingError:
+            return
         path_index = PathIndex(state.root[:])
 
         trefresh = time.monotonic() + 300.0
@@ -750,7 +781,10 @@ def watcher(loop):
                 # Process each collapsed path
                 new_root = path_index.root
                 for path in collapsed:
-                    new_entries = walk(path)
+                    try:
+                        new_entries = walk(path)
+                    except _WatcherStoppingError:
+                        return
                     new_root = path_index.apply_update(path, new_entries)
 
                 # Broadcast if changed
@@ -769,12 +803,51 @@ def watcher(loop):
                             with state.lock:
                                 broadcast(update_msg, loop)
                                 state.root = fresh
+                        except _WatcherStoppingError:
+                            return
                         except Exception:
                             logger.exception("Fallback failed; sending full root")
                             with state.lock:
                                 broadcast(format_root(fresh), loop)
                                 state.root = fresh
 
+            # Drain AR updates from preview worker (immediate, no debounce)
+            ar_new_root: list[FileEntry] | None = None
+            try:
+                while True:
+                    fuid_key, ar = _ar_queue.get_nowait()
+                    _ar_map[fuid_key] = ar
+                    # Patch the matching entry in the current root
+                    root_to_patch = (
+                        ar_new_root if ar_new_root is not None else path_index.root
+                    )
+                    for i, entry in enumerate(root_to_patch):
+                        if entry.key == fuid_key and entry.isfile and entry.ar != ar:
+                            if ar_new_root is None:
+                                ar_new_root = root_to_patch[:]
+                            ar_new_root[i] = FileEntry(
+                                level=entry.level,
+                                name=entry.name,
+                                key=entry.key,
+                                mtime=entry.mtime,
+                                size=entry.size,
+                                allocated=entry.allocated,
+                                isfile=entry.isfile,
+                                ar=ar,
+                            )
+                            break
+            except queue.Empty:
+                pass
+            if ar_new_root is not None:
+                try:
+                    update_msg = format_update(state.root, ar_new_root)
+                    with state.lock:
+                        broadcast(update_msg, loop)
+                        state.root = ar_new_root
+                    path_index = PathIndex(ar_new_root)
+                except Exception:
+                    logger.exception("AR update broadcast failed")
+
             # Collect events from websocket signals (non-blocking)
             try:
                 while True:
@@ -820,6 +893,7 @@ def start(app):
     global rootpath
     config.load_config()
     rootpath = config.config.path
+    stop_event.clear()
     app.ctx.watcher = threading.Thread(
         target=watcher,
         args=[app.loop],

frontend/package.json

@@ -18,8 +18,11 @@
     "node": ">=18.0.0"
   },
   "dependencies": {
+    "@codemirror/language-data": "^6.5.2",
+    "@codemirror/theme-one-dark": "^6.1.3",
     "@imengyu/vue3-context-menu": "^1.5.3",
     "@vueuse/core": "^14.1.0",
+    "codemirror": "^6.0.2",
     "esbuild": "^0.27.2",
     "lodash": "^4.17.23",
     "lodash-es": "^4.17.23",

frontend/src/App.vue

@@ -8,13 +8,36 @@
   <SettingsModal />
   <UserManagementModal />
   <UserTokensModal />
+  <AboutModal />
   <AccessDeniedModal />
   <header>
-    <HeaderMain ref="headerMain" :path="path.pathList" :query="path.query" />
-    <BreadCrumb :path="path.pathList" primary />
+    <HeaderMain
+      ref="headerMain"
+      :path="path.pathList"
+      :query="path.query"
+      :editor-mode="path.isEditorPath"
+    />
+    <BreadCrumb
+      :path="path.breadcrumbPathList"
+      :links="path.breadcrumbLinks"
+      primary
+    />
   </header>
-  <main>
-    <RouterView :path="path.pathList" :query="path.query" />
+  <main class="transition-wrapper">
+    <Transition
+      :name="routeTransitionName"
+      @after-enter="store.transitionDirection = 'none'"
+    >
+      <div :key="routeViewKey" class="explorer-content">
+        <KeepAlive>
+          <component
+            :is="routeViewComponent"
+            :key="routeViewKey"
+            v-bind="routeViewProps"
+          />
+        </KeepAlive>
+      </div>
+    </Transition>
   </main>
   <footer v-if="store.selected.size || store.uprogress.total || store.dprogress.total">
     <SelectionToolbar :path="path.pathList" />
@@ -26,15 +49,18 @@
 <script setup lang="ts">
 import type HeaderMain from '@/components/HeaderMain.vue'
 import { loadSession, watchConnect, watchDisconnect } from '@/repositories/WS'
+import { getDocuments } from '@/stores/documentStore'
 import { useMainStore } from '@/stores/main'
 import type { ComputedRef } from 'vue'
-import { onMounted, onUnmounted, ref, watchEffect } from 'vue'
-import { RouterView } from 'vue-router'
+import { onMounted, onUnmounted, ref, watch } from 'vue'
 
 import Router from '@/router/index'
 import { computed } from 'vue'
+import AboutModal from './components/AboutModal.vue'
 import AccessDeniedModal from './components/AccessDeniedModal.vue'
+import ExplorerView from './views/ExplorerView.vue'
 import SelectionToolbar from './components/SelectionToolbar.vue'
+import TextEditorView from './views/TextEditorView.vue'
 import type SettingsModalVue from './components/SettingsModal.vue'
 import UserManagementModal from './components/UserManagementModal.vue'
 import UserTokensModal from './components/UserTokensModal.vue'
@@ -42,26 +68,95 @@ import type { SortOrder } from './utils/docsort'
 
 interface Path {
   path: string
+  canonicalPath: string
+  isEditorPath: boolean
   pathList: string[]
+  breadcrumbPathList: string[]
+  breadcrumbLinks?: string[]
   query: string
 }
 const store = useMainStore()
+
+const getDocByPath = (fullPath: string) =>
+  getDocuments().find(doc => (doc.loc ? `${doc.loc}/${doc.name}` : doc.name) === fullPath)
+
 const path: ComputedRef<Path> = computed(() => {
   const p = decodeURIComponent(Router.currentRoute.value.path).split('//')
-  const pathList = (p[0] ?? '').split('/').filter(value => value !== '')
+  const rawPath = p[0] ?? ''
+  const routePathList = rawPath.split('/').filter(value => value !== '')
   const query = p.slice(1).join('//')
+  const fullPath = routePathList.join('/')
+  // Access docVersion to make route mode reactive to tree updates
+  void store.docVersion
+  const doc = fullPath ? getDocByPath(fullPath) : null
+  const isEditorPath = !!(doc && !doc.dir && doc.text)
+  const canonicalBase = !fullPath
+    ? '/'
+    : doc?.dir
+      ? `/${fullPath}/`
+      : `/${fullPath}`
+  const canonicalPath = query
+    ? rawPath // keep search URL shape untouched
+    : canonicalBase
+  const pathList = isEditorPath ? routePathList.slice(0, -1) : routePathList
+  const breadcrumbPathList = routePathList
+  const breadcrumbLinks = isEditorPath
+    ? [
+        '/',
+        ...routePathList
+          .slice(0, -1)
+          .map((_, index) => `/${routePathList.slice(0, index + 1).join('/')}/`),
+        `/${fullPath}`
+      ]
+    : undefined
   return {
-    path: p[0] ?? '',
+    path: rawPath,
+    canonicalPath,
+    isEditorPath,
     pathList,
+    breadcrumbPathList,
+    breadcrumbLinks,
     query
   }
 })
-watchEffect(() => {
-  document.title =
-    path.value.path.replace(/\/$/, '').split('/').pop() ||
-    store.server.name ||
-    'Cista Storage'
+const routeTransitionName = computed(() => {
+  if (store.transitionDirection === 'forward') return 'slide-forward'
+  if (store.transitionDirection === 'backward') return 'slide-backward'
+  return ''
 })
+const routeViewComponent = computed(() =>
+  path.value.isEditorPath ? TextEditorView : ExplorerView
+)
+const routeViewKey = computed(() => {
+  return path.value.isEditorPath
+    ? `editor:${path.value.path}`
+    : 'explorer'
+})
+const routeViewProps = computed(() =>
+  path.value.isEditorPath
+    ? {}
+    : { path: path.value.pathList, query: path.value.query }
+)
+watch(
+  () => path.value.canonicalPath,
+  canonical => {
+    const current = decodeURIComponent(Router.currentRoute.value.path)
+    if (canonical && current !== canonical) {
+      Router.replace(canonical.replaceAll('?', '%3F').replaceAll('#', '%23'))
+    }
+  },
+  { immediate: true }
+)
+watch(
+  () => path.value.path,
+  () => {
+    document.title =
+      path.value.path.replace(/\/$/, '').split('/').pop() ||
+      store.server.name ||
+      'Cista Storage'
+  },
+  { immediate: true }
+)
 onMounted(loadSession)
 onMounted(watchConnect)
 onUnmounted(watchDisconnect)
@@ -80,7 +175,9 @@ const globalShortcutHandler = (event: KeyboardEvent) => {
   const fileExplorer = store.fileExplorer as any
   if (!fileExplorer) return
   const c = fileExplorer.isCursor()
-  const input = (event.target as HTMLElement).tagName === 'INPUT'
+  const target = event.target as HTMLElement
+  const input =
+    ['INPUT', 'TEXTAREA'].includes(target.tagName) || !!target.closest('.cm-editor')
   const keyup = event.type === 'keyup'
 
   // Always clear repeat timer on arrow keyup, even if focus moved to input
@@ -95,6 +192,8 @@ const globalShortcutHandler = (event: KeyboardEvent) => {
       event.key === 'ArrowDown' ||
       event.key === 'ArrowLeft' ||
       event.key === 'ArrowRight' ||
+      event.key === 'PageUp' ||
+      event.key === 'PageDown' ||
       (c && event.code === 'Space')
     ) {
       if (!input) event.preventDefault()
@@ -104,6 +203,7 @@ const globalShortcutHandler = (event: KeyboardEvent) => {
   //console.log("key pressed", event)
   /// Long if-else machina for all keys we handle here
   let arrow = ''
+  let paging = ''
   const inHeader = !!(event.target as HTMLElement).closest('.headermain')
   const inBreadcrumb = !!(event.target as HTMLElement).closest('.breadcrumb')
   // Handle arrows: in search input with text, only up/down; otherwise all arrows
@@ -115,17 +215,35 @@ const globalShortcutHandler = (event: KeyboardEvent) => {
     if (searchHasText && (dir === 'left' || dir === 'right')) {
       return // Let browser handle cursor movement
     }
+    // Don't intercept arrows for non-search inputs (e.g. rename input)
+    if (input && !searchInput) return
     arrow = dir
+  } else if (
+    event.key === 'PageUp' ||
+    event.key === 'PageDown' ||
+    event.key === 'Home' ||
+    event.key === 'End'
+  ) {
+    if (input) return
+    paging = event.key
   }
   if (arrow) {
     // Arrow key handling - fall through to bottom
+  } else if (paging) {
+    // Paging/navigation key handling - fall through to bottom
   }
   // Find: process on keydown so that we can bypass the built-in search hotkey
-  else if (!keyup && event.key === 'f' && (event.ctrlKey || event.metaKey)) {
+  else if (
+    !path.value.isEditorPath &&
+    !input &&
+    !keyup &&
+    event.key === 'f' &&
+    (event.ctrlKey || event.metaKey)
+  ) {
     headerMain.value!.toggleSearchInput()
   }
   // Search also on / (UNIX style) - use code to support any keyboard layout
-  else if (!input && keyup && event.code === 'Slash') {
+  else if (!path.value.isEditorPath && !input && keyup && event.code === 'Slash') {
     // Record the actual character for display (varies by keyboard layout)
     if (event.key.length === 1 && event.key !== store.prefs.searchHotkey) {
       store.prefs.searchHotkey = event.key
@@ -136,7 +254,11 @@ const globalShortcutHandler = (event: KeyboardEvent) => {
   else if (keyup && event.key === 'Escape') {
     store.error = ''
     store.clearToast()
-    headerMain.value!.clearSearch(event)
+    // Keep rename and other non-search inputs isolated from search behavior.
+    if (input && !searchInput) return
+    if (!path.value.isEditorPath) {
+      headerMain.value!.clearSearch(event)
+    }
     store.focusBreadcrumb()
   } else if (!input && keyup && event.key === 'Backspace') {
     Router.back()
@@ -235,12 +357,28 @@ const globalShortcutHandler = (event: KeyboardEvent) => {
           break
       }
     }
+  } else if (paging && !keyup && !inHeader && !inBreadcrumb) {
+    switch (paging) {
+      case 'PageUp':
+        f = () => fileExplorer.pageUp?.(event)
+        break
+      case 'PageDown':
+        f = () => fileExplorer.pageDown?.(event)
+        break
+      case 'Home':
+        f = () => fileExplorer.home?.(event)
+        break
+      case 'End':
+        f = () => fileExplorer.end?.(event)
+        break
+    }
   }
   if (f) {
     // Initial move, then t0 delay until repeats at tr intervals
     const t0 = 200,
       tr = event.altKey ? 20 : 100
     f()
+    if (paging === 'Home' || paging === 'End') return
     timer = setTimeout(() => {
       timer = setInterval(f, tr)
     }, t0 - tr)

frontend/src/assets/logo-square.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="512" height="512" viewBox="0 0 512 512"><rect width="512" height="512" fill="#f80"/><path fill="#fff" d="M381 298h-84V167h-66L339 35l108 132h-66zm-168-84h-84v131H63l108 132 108-132h-66z"/></svg>

frontend/src/assets/main.css

@@ -57,6 +57,68 @@
     align-self: stretch;
   }
 }
+/* Directory navigation slide transitions */
+.transition-wrapper {
+  display: grid;
+  grid-template-columns: 1fr;
+  grid-template-rows: 1fr;
+  height: 100%;
+}
+
+.explorer-content {
+  grid-area: 1 / 1;
+  height: 100%;
+}
+
+.slide-forward-enter-active,
+.slide-backward-enter-active {
+  z-index: 2;
+}
+
+.slide-forward-leave-active,
+.slide-backward-leave-active {
+  z-index: 1;
+}
+
+.slide-forward-enter-active,
+.slide-forward-leave-active,
+.slide-backward-enter-active,
+.slide-backward-leave-active {
+  transition: transform 0.22s cubic-bezier(0.32, 0.72, 0, 1);
+}
+
+.slide-forward-enter-from {
+  transform: translate3d(100%, 0, 0);
+}
+
+.slide-forward-enter-to {
+  transform: translate3d(0, 0, 0);
+}
+
+.slide-forward-leave-from {
+  transform: translate3d(0, 0, 0);
+}
+
+.slide-forward-leave-to {
+  transform: translate3d(-100%, 0, 0);
+}
+
+.slide-backward-enter-from {
+  transform: translate3d(-100%, 0, 0);
+}
+
+.slide-backward-enter-to {
+  transform: translate3d(0, 0, 0);
+}
+
+.slide-backward-leave-from {
+  transform: translate3d(0, 0, 0);
+}
+
+.slide-backward-leave-to {
+  transform: translate3d(100%, 0, 0);
+}
+
 @media print {
   :root {
     --primary-color: black;
@@ -206,6 +268,8 @@ main {
   min-height: 0; /* Allow flex child to shrink below content size */
   padding-bottom: 3em; /* convenience space on the bottom */
   overflow-y: scroll;
+  overflow-x: hidden;
+  position: relative;
   text-align: center;
 }
 

frontend/src/assets/svg/create-file.svg

@@ -1 +1,3 @@
-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 32 32"><path d="M19.2 2.6H6.1V29h19.8V9.3l-6.7-6.7zm3 15c0 .2-.2.4-.4.4h-4.4v4.4c0 .2-.2.4-.4.4h-2.4c-.2 0-.4-.2-.4-.4V18H9.9c-.2 0-.4-.2-.4-.4v-2.4c0-.2.2-.4.4-.4h4.4v-4.4c0-.2.2-.4.4-.4H17c.2 0 .4.2.4.4v4.4h4.4c.2 0 .4.2.4.4v2.4z"/></svg>
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 28 28">
+	<path fill-rule="evenodd" d="M19.2 2.6H6.1V29h19.8V9.3l-6.7-6.7zM22.75 18.55c0 .2625-.175.4375-.4375.4375h-4.55v4.55c0 .2625-.175.4375-.4375.4375h-2.45c-.2625 0-.4375-.175-.4375-.4375v-4.55h-4.55c-.2625 0-.4375-.175-.4375-.4375V16.1c0-.2625.175-.4375.4375-.4375h4.55v-4.55c0-.2625.175-.4375.4375-.4375h2.45c.2625 0 .4375.175.4375.4375v4.55h4.55c.2625 0 .4375.175.4375.4375v2.45z" />
+</svg>

frontend/src/assets/svg/link.svg

@@ -1 +1 @@
-<svg xmlns="http://www.w3.org/2000/svg" width="512" height="512" viewBox="0 0 512 512"><path d="M384 128h-69c24 16 46.5 44.5 53.5 64h15c32.5 0 64 32 64 64s-32.5 64-64 64h-96c-31.5 0-64-32-64-64 0-11.5 3.5-22.5 9-32H164c-2.5 10.5-4 21-4 32 0 64 63.5 128 127.5 128H384c64 0 128-64 128-128s-64-128-128-128zM143.5 320h-15c-32.5 0-64-32-64-64s32.5-64 64-64h96c31.5 0 64 32 64 64 0 11.5-3.5 22.5-9 32H348c2.5-10.5 4-21 4-32 0-64-63.5-128-127.5-128H128C64 128 0 192 0 256s64 128 128 128h69c-24-16-46.5-44.5-53.5-64z"/></svg>
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path d="M384 128h-69c24 16 46.5 44.5 53.5 64h15c32.5 0 64 32 64 64s-32.5 64-64 64h-96c-31.5 0-64-32-64-64 0-11.5 3.5-22.5 9-32H164c-2.5 10.5-4 21-4 32 0 64 63.5 128 127.5 128H384c64 0 128-64 128-128s-64-128-128-128zM143.5 320h-15c-32.5 0-64-32-64-64s32.5-64 64-64h96c31.5 0 64 32 64 64 0 11.5-3.5 22.5-9 32H348c2.5-10.5 4-21 4-32 0-64-63.5-128-127.5-128H128C64 128 0 192 0 256s64 128 128 128h69c-24-16-46.5-44.5-53.5-64z"/></svg>

frontend/src/components/AboutModal.vue

@@ -0,0 +1,110 @@
+<template>
+  <ModalDialog name="about" title="">
+    <div class="about-content">
+      <div class="about-logo-pane">
+        <img :src="logoUrl" alt="Cista Storage logo" class="about-logo" />
+      </div>
+      <div class="about-details">
+        <h3 class="about-name">Cista {{ softwareVersion }}</h3>
+        <p class="about-link">
+          <a :href="projectUrl" target="_blank" rel="noopener noreferrer">{{ displayProjectUrl }}</a>
+        </p>
+        <div class="dialog-buttons about-actions">
+          <div class="spacer"></div>
+          <input id="close" type="reset" value="Close" class="button" @click="close" />
+        </div>
+      </div>
+    </div>
+  </ModalDialog>
+</template>
+
+<script setup lang="ts">
+import logoUrl from '@/assets/logo-square.svg?url'
+import ModalDialog from '@/components/ModalDialog.vue'
+import { useMainStore } from '@/stores/main'
+import { computed } from 'vue'
+
+const store = useMainStore()
+
+const softwareVersion = computed(() => store.server.version || 'unknown')
+const projectUrl = 'https://git.zi.fi/Vasanko/cista-storage'
+const displayProjectUrl = projectUrl.replace(/^https?:\/\//, '')
+
+const close = () => {
+  store.dialog = ''
+}
+</script>
+
+<style scoped>
+:deep(#about.modal-dialog) {
+  overflow: hidden;
+}
+
+.about-content {
+  display: grid;
+  grid-template-columns: 11rem minmax(0, 1fr);
+  align-items: stretch;
+  width: min(35rem, 92vw);
+  min-width: 0;
+  min-height: 0;
+  margin: -1rem;
+  overflow: hidden;
+}
+
+.about-logo-pane {
+  display: block;
+  padding: 0;
+  overflow: hidden;
+}
+
+.about-logo {
+  width: 100%;
+  height: auto;
+  aspect-ratio: 1 / 1;
+  margin: 0;
+  display: block;
+}
+
+.about-details {
+  display: flex;
+  flex-direction: column;
+  justify-content: center;
+  padding: 1.25rem;
+}
+
+.about-name {
+  margin: 0;
+}
+
+.about-link {
+  margin: 0.65rem 0 1rem;
+  word-break: break-word;
+}
+
+.about-actions {
+  margin-top: auto;
+}
+
+@media (max-width: 40rem) {
+  .about-content {
+    grid-template-columns: 1fr;
+    width: min(24rem, 90vw);
+  }
+
+  .about-logo-pane {
+    width: 100%;
+    aspect-ratio: 1 / 1;
+  }
+
+  .about-logo {
+    width: 100%;
+    height: 100%;
+    aspect-ratio: 1 / 1;
+    object-fit: contain;
+  }
+
+  .about-details {
+    padding: 0.85rem;
+  }
+}
+</style>

frontend/src/components/AccessDeniedModal.vue

@@ -1,32 +1,19 @@
 <template>
-  <div v-if="store.dialog === 'accessdenied'" class="modal-overlay">
-    <div class="modal-dialog" id="accessdenied">
-      <div class="modal-content access-denied">
-        <p class="icon">⛔</p>
-        <p class="message">Access Denied</p>
-        <button @click="reload" class="button">Reload</button>
-      </div>
+  <ModalDialog name="accessdenied" title="">
+    <div class="access-denied">
+      <p class="icon">⛔</p>
+      <p class="message">Access Denied</p>
+      <button @click="reload" class="button">Reload</button>
     </div>
-  </div>
+  </ModalDialog>
 </template>
 
 <script setup lang="ts">
-import { useMainStore } from '@/stores/main'
-import { holdGlobalBackdrop } from 'paskia'
-import { watchEffect } from 'vue'
-
-const store = useMainStore()
+import ModalDialog from '@/components/ModalDialog.vue'
 
 const reload = () => {
   location.reload()
 }
-
-// Keep backdrop active when this dialog shows
-watchEffect(() => {
-  if (store.dialog === 'accessdenied') {
-    holdGlobalBackdrop()
-  }
-})
 </script>
 
 <style scoped>

frontend/src/components/BreadCrumb.vue

@@ -8,7 +8,7 @@
     @focus=focusCurrent
     tabindex=0
   >
-    <a href="#/"
+    <a :href="`/#${urlAt(0)}`"
       :ref="el => setLinkRef(0, el)"
       class="home"
       :class="{ current: !!isCurrent(0) }"
@@ -22,7 +22,7 @@
       <CursorTooltip ref="homeTooltip" text="/">/</CursorTooltip>
     </a>
     <template v-for="(location, index) in longest" :key="index">
-      <a :href="`/#/${longest.slice(0, index + 1).join('/')}/`"
+      <a :href="`/#${urlAt(index + 1)}`"
         :class="{ current: !!isCurrent(index + 1) }"
         :aria-current="isCurrent(index + 1)"
         @click.prevent="navigate(index + 1)"
@@ -62,10 +62,17 @@ const setPathTooltipRef = (index: number, el: any) => {
 
 const props = defineProps<{
   path: Array<string>
+  links?: Array<string>
   primary?: boolean
 }>()
 
 const longest = ref<Array<string>>([])
+const longestLinks = ref<Array<string>>(['/'])
+
+const defaultLinks = (segments: Array<string>) => [
+  '/',
+  ...segments.map((_, index) => `/${segments.slice(0, index + 1).join('/')}/`)
+]
 
 const isCurrent = (index: number) =>
   index == props.path.length ? 'location' : undefined
@@ -77,16 +84,22 @@ const focusCurrent = () => {
   })
 }
 
+const urlAt = (index: number) => {
+  const explicit = longestLinks.value[index]
+  return explicit ?? (index ? `/${longest.value.slice(0, index).join('/')}/` : '/')
+}
+
 const navigate = (index: number) => {
   const link = links[index]
   if (!link) throw Error(`No link at index ${index} (path: ${props.path})`)
-  const url = index ? `/${longest.value.slice(0, index).join('/')}/` : '/'
+  const url = urlAt(index)
   const long = longest.value.length ? `/${longest.value.join('/')}/` : '/'
   const browser = decodeURIComponent(location.hash.slice(1).split('//')[0] ?? '')
   const u = url.replaceAll('?', '%3F').replaceAll('#', '%23')
   // Clicking on current link clears the rest of the path and adds new history
   if (isCurrent(index)) {
     longest.value.splice(index)
+    longestLinks.value.splice(index + 1)
     router.push(u)
   }
   // Moving along breadcrumbs doesn't create new history
@@ -102,20 +115,27 @@ const move = (dir: number) => {
 }
 
 watchEffect(() => {
+  const currentLinks = props.links ?? defaultLinks(props.path)
   const longcut = longest.value.slice(0, props.path.length)
   const same = longcut.every((value, index) => value === props.path[index])
   // Navigated out of previous path, reset longest to current
-  if (!same) longest.value = props.path
+  if (!same) {
+    longest.value = props.path
+    longestLinks.value = currentLinks
+  }
   else if (props.path.length > longcut.length) {
     longest.value = longcut.concat(props.path.slice(longcut.length))
+    longestLinks.value.splice(0, currentLinks.length, ...currentLinks)
   } else {
     // Prune deleted folders from longest
     for (let i = props.path.length; i < longest.value.length; ++i) {
       if (!exists(longest.value.slice(0, i + 1))) {
         longest.value = longest.value.slice(0, i)
+        longestLinks.value = longestLinks.value.slice(0, i + 1)
         break
       }
     }
+    longestLinks.value.splice(0, currentLinks.length, ...currentLinks)
   }
   // If needed, focus primary navigation to new location
   if (props.primary)

frontend/src/components/DiskSpace.vue

@@ -26,7 +26,7 @@
       </defs>
 
       <g :filter="isExpanded ? 'url(#pieShadow)' : 'none'">
-        <circle :r="midRadius" :cx="pieCx" :cy="pieCy" fill="transparent" stroke="url(#otherGradient)" :stroke-width="ringWidth" />
+        <circle :r="midRadius" :cx="pieCx" :cy="pieCy" fill="transparent" :stroke="showOtherCategory ? 'url(#otherGradient)' : freeColor" :stroke-width="ringWidth" />
         <circle :r="midRadius" :cx="pieCx" :cy="pieCy" fill="transparent" :stroke="freeColor" :stroke-width="ringWidth" :stroke-dasharray="pieFreeDash" :stroke-dashoffset="pieFreeOffsetVal" :transform="`rotate(-90 ${pieCx} ${pieCy})`" />
         <circle :r="midRadius" :cx="pieCx" :cy="pieCy" fill="transparent" stroke="url(#storageGradient)" :stroke-width="ringWidth" :stroke-dasharray="pieStorageDash" :transform="`rotate(-90 ${pieCx} ${pieCy})`" />
         <circle :r="midRadius" :cx="pieCx" :cy="pieCy" fill="transparent" stroke="url(#highlightOverlay)" :stroke-width="ringWidth" />
@@ -38,12 +38,12 @@
       <g ref="labelsRef" class="pie-labels">
         <text :x="storageInnerPos.x" :y="storageInnerPos.y" class="pie-label-inner" :text-anchor="getSizeAnchor(sectorInfo.storage.angle)" dominant-baseline="middle" :transform="`rotate(${getSizeRotation(sectorInfo.storage.angle)} ${storageInnerPos.x} ${storageInnerPos.y})`">{{ fmtSize(store.space.allocated, sectorInfo.storage.angle) }}</text>
         <text :x="freeInnerPos.x" :y="freeInnerPos.y" class="pie-label-inner" :text-anchor="getSizeAnchor(sectorInfo.free.angle)" dominant-baseline="middle" :transform="`rotate(${getSizeRotation(sectorInfo.free.angle)} ${freeInnerPos.x} ${freeInnerPos.y})`">{{ fmtSize(store.space.free, sectorInfo.free.angle) }}</text>
-        <text :x="otherInnerPos.x" :y="otherInnerPos.y" class="pie-label-inner" :text-anchor="getSizeAnchor(sectorInfo.other.angle)" dominant-baseline="middle" :transform="`rotate(${getSizeRotation(sectorInfo.other.angle)} ${otherInnerPos.x} ${otherInnerPos.y})`">{{ fmtSize(store.space.used - store.space.allocated, sectorInfo.other.angle) }}</text>
+        <text v-if="showOtherCategory" :x="otherInnerPos.x" :y="otherInnerPos.y" class="pie-label-inner" :text-anchor="getSizeAnchor(sectorInfo.other.angle)" dominant-baseline="middle" :transform="`rotate(${getSizeRotation(sectorInfo.other.angle)} ${otherInnerPos.x} ${otherInnerPos.y})`">{{ fmtSize(store.space.used - store.space.allocated, sectorInfo.other.angle) }}</text>
 
         <defs>
           <path :id="storageLabelPath.id" :d="storageLabelPath.d" fill="none" />
           <path :id="freeLabelPath.id" :d="freeLabelPath.d" fill="none" />
-          <path :id="otherLabelPath.id" :d="otherLabelPath.d" fill="none" />
+          <path v-if="showOtherCategory" :id="otherLabelPath.id" :d="otherLabelPath.d" fill="none" />
         </defs>
 
         <text class="pie-label-sub" fill="#93e">
@@ -52,7 +52,7 @@
         <text class="pie-label-sub" :fill="freeColor">
           <textPath :href="'#' + freeLabelPath.id" startOffset="50%" text-anchor="middle" dominant-baseline="middle">free</textPath>
         </text>
-        <text class="pie-label-sub" fill="#d9f">
+        <text v-if="showOtherCategory" class="pie-label-sub" fill="#d9f">
           <textPath :href="'#' + otherLabelPath.id" startOffset="50%" text-anchor="middle" dominant-baseline="middle">other</textPath>
         </text>
       </g>
@@ -98,18 +98,28 @@ const truncateLabel = (name: string, maxLen = 10): string => {
   return name.slice(0, maxLen - 1) + '…'
 }
 
+const otherBytes = computed(() => Math.max(0, store.space.used - store.space.allocated))
+const showOtherCategory = computed(() => {
+  const s = store.space
+  return !!s.disk && otherBytes.value / s.disk >= 0.01
+})
+const freeSliceBytes = computed(() =>
+  showOtherCategory.value ? store.space.free : Math.max(0, store.space.disk - store.space.allocated)
+)
+
 // Calculate max label length based on angular gap to neighbor labels
 const storageMaxLen = computed(() => {
   const s = store.space
   if (!s.disk) return 10
   // Sector spans in degrees
   const storageSpan = (s.allocated / s.disk) * 360
-  const freeSpan = (s.free / s.disk) * 360
-  const otherSpan = ((s.used - s.allocated) / s.disk) * 360
+  const freeSpan = (freeSliceBytes.value / s.disk) * 360
+  const otherSpan = (otherBytes.value / s.disk) * 360
   // Angular gap from storage label midpoint to neighbor label midpoints
   const gapToFree = (storageSpan + freeSpan) / 2
-  const gapToOther = (storageSpan + otherSpan) / 2
-  const minGap = Math.min(gapToFree, gapToOther)
+  const minGap = showOtherCategory.value
+    ? Math.min(gapToFree, (storageSpan + otherSpan) / 2)
+    : gapToFree
   // Allow longer names when there's sufficient gap to both neighbors
   if (minGap > 70) return 18
   if (minGap > 55) return 14
@@ -143,7 +153,7 @@ const pieStorageDash = computed(() => {
 const pieFreeDash = computed(() => {
   const s = store.space
   if (!s.disk) return `0 ${CIRC}`
-  return `${(s.free / s.disk) * CIRC} ${CIRC}`
+  return `${(freeSliceBytes.value / s.disk) * CIRC} ${CIRC}`
 })
 
 const pieFreeOffsetVal = computed(() => {
@@ -179,8 +189,8 @@ const sectorInfo = computed(() => {
     }
 
   const storagePct = s.allocated / s.disk
-  const freePct = s.free / s.disk
-  const otherPct = (s.used - s.allocated) / s.disk
+  const freePct = freeSliceBytes.value / s.disk
+  const otherPct = showOtherCategory.value ? otherBytes.value / s.disk : 0
 
   const storageAngle = storagePct * 180 // midpoint of storage sector
   const freeStart = storagePct * 360
@@ -198,7 +208,7 @@ const sectorInfo = computed(() => {
 const rawAngles = computed(() => ({
   storage: sectorInfo.value.storage.angle,
   free: sectorInfo.value.free.angle,
-  other: sectorInfo.value.other.angle
+  ...(showOtherCategory.value ? { other: sectorInfo.value.other.angle } : {})
 }))
 
 const getSizeRotation = (angle: number) => (angle < 180 ? angle - 90 : angle + 90)
@@ -219,7 +229,7 @@ const otherInnerPos = computed(() =>
 const labelLengths = computed(() => ({
   storage: storageName.value.length,
   free: 4,
-  other: 5
+  ...(showOtherCategory.value ? { other: 5 } : {})
 }))
 
 const getGapForPair = (len1: number, len2: number) => {
@@ -232,7 +242,9 @@ const adjustedLabelAngles = computed(() => {
   const labels = [
     { id: 'storage', angle: angles.storage, len: lens.storage },
     { id: 'free', angle: angles.free, len: lens.free },
-    { id: 'other', angle: angles.other, len: lens.other }
+    ...(showOtherCategory.value
+      ? [{ id: 'other', angle: angles.other!, len: lens.other! }]
+      : [])
   ]
   labels.sort((a, b) => a.angle - b.angle)
 
@@ -283,7 +295,7 @@ const freeLabelPath = computed(() =>
   createArcPath(adjustedLabelAngles.value.free!, 'free', 4)
 )
 const otherLabelPath = computed(() =>
-  createArcPath(adjustedLabelAngles.value.other!, 'other', 5)
+  createArcPath(adjustedLabelAngles.value.other ?? sectorInfo.value.other.angle, 'other', 5)
 )
 
 const handleClick = () => (isExpanded.value ? collapse() : expand())

frontend/src/components/FileExplorer.vue

@@ -12,10 +12,10 @@
       </tr>
     </thead>
     <tbody>
-      <tr v-if="editing?.key === 'new'" class="folder">
+      <tr v-if="editing?.key === 'new'" :class="editing.dir ? 'folder' : 'file'">
         <td class="selection"></td>
         <td class="name">
-          <FileRenameInput :doc="editing" :rename="mkdir" :exit="() => {editing = null}" />
+          <FileRenameInput :doc="editing" :rename="createItem" :exit="() => {editing = null}" />
         </td>
         <FileModified :doc=editing :now=nowkey />
         <FileSize :doc=editing />
@@ -49,7 +49,7 @@
               <FileRenameInput :doc="doc" :rename="rename" :exit="() => {editing = null}" />
             </template>
             <template v-else>
-              <a :href=doc.url tabindex=-1 @contextmenu.stop @focus.stop="store.cursor = doc.key">
+              <a :href="doc.text ? doc.editurl : doc.url" tabindex=-1 @contextmenu.stop @focus.stop="store.cursor = doc.key">
                 {{ doc.name }}
               </a>
               <button tabindex=-1 v-if="store.cursor == doc.key" class="rename-button" @click="() => (editing = doc)">🖊️</button>
@@ -76,6 +76,7 @@ import { apiFetch } from '@/repositories/Client'
 import { Doc } from '@/repositories/Document'
 import { useMainStore } from '@/stores/main'
 import { formatSize } from '@/utils'
+import { createKeyboardFollowScroll } from '@/utils/keyboardFollowScroll'
 import ContextMenu from '@imengyu/vue3-context-menu'
 import {
   computed,
@@ -112,27 +113,113 @@ const parseErrorMessage = async (res: Response) => {
   }
 }
 
+const getCursorIndex = () =>
+  store.cursor
+    ? props.documents.findIndex(doc => doc.key === store.cursor)
+    : props.documents.length
+
+const getDocElement = (key: string) =>
+  document.getElementById(`file-${key}`) as HTMLElement | null
+
+const moveCursorTo = (moveto: number, ev: KeyboardEvent | null) => {
+  const select = !!ev?.shiftKey
+  const docs = props.documents
+  if (docs.length === 0) {
+    store.cursor = ''
+    return
+  }
+  const N = docs.length
+  const mod = (a: number, b: number) => ((a % b) + b) % b
+  const increment = (i: number, d: number) => mod(i + d, N + 1)
+  const index = getCursorIndex()
+
+  store.cursor = docs[moveto]?.key ?? ''
+  const tr = store.cursor ? getDocElement(store.cursor) : null
+  if (select) {
+    let [begin, end] = moveto >= index ? [index, moveto] : [moveto, index]
+    for (let p = begin; p !== end; p = increment(p, 1)) {
+      if (p === N) continue
+      const key = docs[p]!.key
+      if (store.selected.has(key)) store.selected.delete(key)
+      else store.selected.add(key)
+    }
+  }
+  keepCursorVisibleSmooth(tr)
+  if (moveto === N) {
+    if (index > moveto) focusBreadcrumb()
+    else focusHeader()
+  }
+}
+
+const pageMove = (direction: 1 | -1, ev: KeyboardEvent) => {
+  const docs = props.documents
+  if (docs.length === 0) return
+  const scroller =
+    (document.querySelector('main') as HTMLElement | null) ?? document.documentElement
+  const currentIndex = getCursorIndex()
+  const currentEl = store.cursor ? getDocElement(store.cursor) : null
+  const currentCenter = currentEl
+    ? currentEl.getBoundingClientRect().top +
+      currentEl.getBoundingClientRect().height / 2
+    : scroller.getBoundingClientRect().top + scroller.clientHeight / 2
+  const targetCenter =
+    currentCenter + direction * Math.max(120, scroller.clientHeight - 140)
+
+  let bestIndex = direction > 0 ? docs.length - 1 : 0
+  let bestDistance = Number.POSITIVE_INFINITY
+  for (let i = 0; i < docs.length; i++) {
+    if (
+      currentIndex !== docs.length &&
+      ((direction > 0 && i <= currentIndex) || (direction < 0 && i >= currentIndex))
+    )
+      continue
+    const el = getDocElement(docs[i]!.key)
+    if (!el) continue
+    const center =
+      el.getBoundingClientRect().top + el.getBoundingClientRect().height / 2
+    const distance = Math.abs(center - targetCenter)
+    if (distance < bestDistance) {
+      bestDistance = distance
+      bestIndex = i
+    }
+  }
+  markKeyboardFollow()
+  moveCursorTo(bestIndex, ev)
+}
+
 // File rename
 const editing = shallowRef<Doc | null>(null)
 const rename = async (doc: Doc, newName: string) => {
   const oldName = doc.name
   doc.name = newName // We should get an update from watch but this is quicker
+  store.documentsChanged()
   try {
     const dstUrl = doc.loc ? filesUrl(doc.loc) : '/files/'
-    const res = await apiFetch(
-      `${dstUrl}?mv=${doc.key}&to=${encodeURIComponent(newName)}`,
-      { method: 'POST' }
-    )
+    const targetUrl = `${dstUrl}${dstUrl.endsWith('/') ? '' : '/'}${encodeURIComponent(newName)}`
+    const res = await apiFetch(`${targetUrl}?mv=${doc.key}`, { method: 'POST' })
     if (!res.ok) throw new Error(await parseErrorMessage(res))
   } catch (err) {
     console.error('Rename failed', err)
     doc.name = oldName
+    store.documentsChanged()
     store.showToast(err instanceof Error ? err.message : 'Rename failed')
   }
 }
 defineExpose({
+  newFile() {
+    const now = Math.floor(Date.now() / 1000)
+    editing.value = new Doc({
+      loc: loc.value,
+      key: 'new',
+      name: 'New File.txt',
+      dir: false,
+      mtime: now,
+      size: 0,
+      allocated: 0
+    })
+    store.cursor = editing.value.key
+  },
   newFolder() {
-    console.log('New folder')
     const now = Math.floor(Date.now() / 1000)
     editing.value = new Doc({
       loc: loc.value,
@@ -176,14 +263,33 @@ defineExpose({
     } else {
       store.selected.add(key)
     }
+    markKeyboardFollow()
     this.cursorMove(1, null)
   },
   up(ev: KeyboardEvent) {
+    markKeyboardFollow()
     this.cursorMove(-1, ev)
   },
   down(ev: KeyboardEvent) {
+    markKeyboardFollow()
     this.cursorMove(1, ev)
   },
+  pageUp(ev: KeyboardEvent) {
+    pageMove(-1, ev)
+  },
+  pageDown(ev: KeyboardEvent) {
+    pageMove(1, ev)
+  },
+  home(ev: KeyboardEvent) {
+    if (!props.documents.length) return
+    markKeyboardFollow()
+    moveCursorTo(0, ev)
+  },
+  end(ev: KeyboardEvent) {
+    if (!props.documents.length) return
+    markKeyboardFollow()
+    moveCursorTo(props.documents.length - 1, ev)
+  },
   left(ev: KeyboardEvent) {
     // Only go back if we're in a subfolder (not at root)
     if (props.path.length > 0) {
@@ -197,8 +303,6 @@ defineExpose({
     if (a) a.click()
   },
   cursorMove(d: number, ev: KeyboardEvent | null) {
-    const select = !!ev?.shiftKey
-    // Move cursor up or down (keyboard navigation)
     const docs = props.documents
     if (docs.length === 0) {
       store.cursor = ''
@@ -207,35 +311,9 @@ defineExpose({
     const N = docs.length
     const mod = (a: number, b: number) => ((a % b) + b) % b
     const increment = (i: number, d: number) => mod(i + d, N + 1)
-    const index = store.cursor
-      ? docs.findIndex(doc => doc.key === store.cursor)
-      : docs.length
+    const index = getCursorIndex()
     const moveto = increment(index, d)
-    store.cursor = docs[moveto]?.key ?? ''
-    const tr = store.cursor ? document.getElementById(`file-${store.cursor}`) : ''
-    if (select) {
-      // Go forwards, possibly wrapping over the end; the last entry is not toggled
-      let [begin, end] = d > 0 ? [index, moveto] : [moveto, index]
-      for (let p = begin; p !== end; p = increment(p, 1)) {
-        if (p === N) continue
-        const key = docs[p]!.key
-        if (store.selected.has(key)) store.selected.delete(key)
-        else store.selected.add(key)
-      }
-    }
-    // @ts-ignore
-    scrolltr = tr
-    if (!scrolltimer) {
-      scrolltimer = setTimeout(() => {
-        if (scrolltr) scrolltr.scrollIntoView({ block: 'center', behavior: 'smooth' })
-        scrolltimer = null
-      }, 300)
-    }
-    // When leaving the file list: up goes to breadcrumbs, down goes to header
-    if (moveto === N) {
-      if (d < 0) focusBreadcrumb()
-      else focusHeader()
-    }
+    moveCursorTo(moveto, ev)
   }
 })
 const focusHeader = () => {
@@ -248,8 +326,9 @@ const focusBreadcrumb = () => {
   const el = document.querySelector('.breadcrumb') as HTMLElement | null
   if (el) el.focus()
 }
-let scrolltimer: any = null
-let scrolltr: any = null
+const keyboardFollowScroll = createKeyboardFollowScroll()
+const markKeyboardFollow = keyboardFollowScroll.markKeyboardFollow
+const keepCursorVisibleSmooth = keyboardFollowScroll.keepVisible
 watchEffect(() => {
   if (store.cursor && store.cursor !== editing.value?.key) editing.value = null
   if (editing.value) store.cursor = editing.value?.key
@@ -257,7 +336,7 @@ watchEffect(() => {
     const a = document.querySelector(
       `#file-${store.cursor} .name a`
     ) as HTMLAnchorElement | null
-    if (a) a.focus()
+    if (a) a.focus({ preventScroll: true })
   }
 })
 watchEffect(() => {
@@ -276,26 +355,43 @@ onMounted(() => {
   modifiedTimer = setInterval(updateModified, 1000)
   const active = document.querySelector('.cursor') as HTMLElement | null
   if (active) {
-    active.scrollIntoView({ block: 'center', behavior: 'instant' })
-    active.focus()
+    active.focus({ preventScroll: true })
   }
 })
 onUnmounted(() => {
+  keyboardFollowScroll.cancel()
   clearInterval(modifiedTimer)
 })
-const mkdir = async (doc: Doc, name: string) => {
+const editRoute = (path: string) =>
+  '/' +
+  path
+    .split('/')
+    .map(part => encodeURIComponent(part))
+    .join('/')
+
+const createItem = async (doc: Doc, name: string) => {
   doc.name = name
   doc.key = crypto.randomUUID()
   store.addGhost(doc)
   editing.value = null
   const path = doc.loc ? `${doc.loc}/${name}` : name
   try {
-    const res = await apiFetch(filesUrl(path), { method: 'MKCOL' })
+    const res = doc.dir
+      ? await apiFetch(filesUrl(path), { method: 'MKCOL' })
+      : await apiFetch(filesUrl(path), {
+          method: 'PUT',
+          body: '',
+          headers: { 'Content-Type': 'text/plain; charset=utf-8' }
+        })
     if (!res.ok) throw new Error(await parseErrorMessage(res))
-    router.push(doc.urlrouter)
+    if (doc.dir) {
+      router.push(doc.urlrouter)
+    } else {
+      router.push(editRoute(path))
+    }
   } catch (err) {
-    console.error('Mkdir failed', err)
-    store.showToast(err instanceof Error ? err.message : 'Mkdir failed')
+    console.error('Create failed', err)
+    store.showToast(err instanceof Error ? err.message : 'Create failed')
   }
 }
 const showFolderBreadcrumb = (i: number) => {

frontend/src/components/Gallery.vue

@@ -1,9 +1,16 @@
 <template>
   <div v-if="props.documents.length || editing" class="gallery" ref="gallery">
-    <GalleryFigure v-if="editing?.key === 'new'" :doc="editing" :key=editing.key :editing="{rename: mkdir, exit}" />
+    <GalleryFigure v-if="editing?.key === 'new'" :doc="editing" :key=editing.key :editing="{rename: createItem, exit}" />
     <template v-for="(doc, index) in documents" :key=doc.key>
       <BreadCrumb v-if="showFolderBreadcrumb(index)" :path="doc.loc ? doc.loc.split('/') : []" class="folder-indicator"/>
-      <GalleryFigure :doc=doc :editing="editing === doc ? {rename, exit} : null" @menu="contextMenu($event, doc)" :class="{ 'folder-start': showFolderBreadcrumb(index) }" />
+      <GalleryFigure
+        :doc=doc
+        :editing="editing === doc ? {rename, exit} : null"
+        :style="{ '--gallery-figure-height': rowHeightsByKey[doc.key] ?? '15em' }"
+        @menu="contextMenu($event, doc)"
+        @rename="editing = doc; store.cursor = doc.key"
+        :class="{ 'folder-start': showFolderBreadcrumb(index) }"
+      />
     </template>
   </div>
 </template>
@@ -13,14 +20,18 @@ import { apiFetch } from '@/repositories/Client'
 import { Doc } from '@/repositories/Document'
 import { useMainStore } from '@/stores/main'
 import type { SortOrder } from '@/utils/docsort'
+import { createKeyboardFollowScroll } from '@/utils/keyboardFollowScroll'
 import ContextMenu from '@imengyu/vue3-context-menu'
 import {
+  onActivated,
+  onDeactivated,
   computed,
   nextTick,
   onMounted,
   onUnmounted,
   ref,
   shallowRef,
+  watch,
   watchEffect
 } from 'vue'
 import { useRouter } from 'vue-router'
@@ -56,29 +67,215 @@ const exit = () => {
 const rename = async (doc: Doc, newName: string) => {
   const oldName = doc.name
   doc.name = newName // We should get an update from watch but this is quicker
+  store.documentsChanged()
   try {
     const dstUrl = doc.loc ? filesUrl(doc.loc) : '/files/'
-    const res = await apiFetch(
-      `${dstUrl}?mv=${doc.key}&to=${encodeURIComponent(newName)}`,
-      { method: 'POST' }
-    )
+    const targetUrl = `${dstUrl}${dstUrl.endsWith('/') ? '' : '/'}${encodeURIComponent(newName)}`
+    const res = await apiFetch(`${targetUrl}?mv=${doc.key}`, { method: 'POST' })
     if (!res.ok) throw new Error(await parseErrorMessage(res))
   } catch (err) {
     console.error('Rename failed', err)
     doc.name = oldName
+    store.documentsChanged()
     store.showToast(err instanceof Error ? err.message : 'Rename failed')
   }
 }
 const gallery = ref<HTMLElement>()
 const columnCount = ref(1)
+const columnWidthPx = ref(240)
+const emPx = ref(16)
+const aspectByKey = ref<Record<string, number>>({})
+
+const optimalRowHeightPx = (ratios: number[]) => {
+  const w = Math.max(1, columnWidthPx.value)
+  const minH = Math.max(1, Math.round(7 * emPx.value))
+  const maxH = Math.max(minH, Math.round(30 * emPx.value))
+  const usable = ratios.filter(ar => Number.isFinite(ar) && ar > 0)
+  if (usable.length === 0) return Math.round(15 * emPx.value)
+
+  let bestH = Math.round(15 * emPx.value)
+  let bestScore = -1
+  for (let h = minH; h <= maxH; h++) {
+    let score = 0
+    for (const ar of usable) {
+      let shownW = w
+      let shownH = w * ar
+      if (shownH > h) {
+        shownH = h
+        shownW = h / ar
+      }
+      // Fill efficiency in the row cell (0..1)
+      score += (shownW * shownH) / (w * h)
+    }
+    if (score > bestScore) {
+      bestScore = score
+      bestH = h
+    }
+  }
+  return bestH
+}
+
+const setAspect = (key: string, ar: number) => {
+  if (!Number.isFinite(ar) || ar <= 0) return
+  if (aspectByKey.value[key] === ar) return
+  aspectByKey.value = {
+    ...aspectByKey.value,
+    [key]: ar
+  }
+}
+
+const rowHeightsByKey = computed<Record<string, string>>(() => {
+  const docs = props.documents
+  const cols = Math.max(1, columnCount.value)
+  const byKey = aspectByKey.value
+  const out: Record<string, string> = {}
+
+  const assignRows = (group: Doc[]) => {
+    for (let start = 0; start < group.length; start += cols) {
+      const row = group.slice(start, start + cols)
+      const ratios = row
+        .filter(doc => doc.previewable)
+        .map(doc => byKey[doc.key])
+        .filter((ar): ar is number => ar != null)
+      const height = `${optimalRowHeightPx(ratios)}px`
+      for (const doc of row) out[doc.key] = height
+    }
+  }
+
+  let group: Doc[] = []
+  for (let i = 0; i < docs.length; i++) {
+    if (i > 0 && docs[i]!.loc !== docs[i - 1]!.loc) {
+      assignRows(group)
+      group = []
+    }
+    group.push(docs[i]!)
+  }
+  assignRows(group)
+
+  return out
+})
+
+// Seed collected ratios from server-provided ar values on docs
+const seedFromDocs = () => {
+  for (const doc of props.documents)
+    if (doc.previewable && doc.ar != null) setAspect(doc.key, doc.ar)
+}
+
+const onImgLoad = (e: Event) => {
+  const img = e.target as HTMLImageElement
+  if (img.tagName !== 'IMG' || img.naturalWidth === 0) return
+  const anchor = img.closest('a[id^="file-"]') as HTMLAnchorElement | null
+  if (!anchor) return
+  const key = anchor.id.slice('file-'.length)
+  if (!key) return
+  setAspect(key, img.naturalHeight / img.naturalWidth)
+}
 const updateColumns = () => {
   if (!gallery.value) return
-  columnCount.value = getComputedStyle(gallery.value).gridTemplateColumns.split(
-    ' '
-  ).length
+  if (gallery.value.getBoundingClientRect().width <= 0) return
+  const style = getComputedStyle(gallery.value)
+  const templates = style.gridTemplateColumns
+    .split(' ')
+    .filter(part => !!part && part !== 'none')
+  columnCount.value = Math.max(1, templates.length)
+  const first = templates[0]
+  if (first && first.endsWith('px')) {
+    const parsed = Number.parseFloat(first)
+    if (Number.isFinite(parsed) && parsed > 0) columnWidthPx.value = parsed
+  }
+  const parsedEm = Number.parseFloat(style.fontSize)
+  if (Number.isFinite(parsedEm) && parsedEm > 0) emPx.value = parsedEm
 }
 const columns = computed(() => columnCount.value)
+
+const getCursorIndex = () =>
+  store.cursor
+    ? props.documents.findIndex(doc => doc.key === store.cursor)
+    : props.documents.length
+
+const getDocElement = (key: string) =>
+  document.getElementById(`file-${key}`) as HTMLElement | null
+
+const moveCursorTo = (moveto: number, ev: KeyboardEvent | null) => {
+  const select = !!ev?.shiftKey
+  const docs = props.documents
+  if (docs.length === 0) {
+    store.cursor = ''
+    return
+  }
+  const N = docs.length
+  const mod = (a: number, b: number) => ((a % b) + b) % b
+  const increment = (i: number, d: number) => mod(i + d, N + 1)
+  const index = getCursorIndex()
+
+  store.cursor = docs[moveto]?.key ?? ''
+  const tr = store.cursor ? getDocElement(store.cursor) : null
+  if (select) {
+    let [begin, end] = moveto >= index ? [index, moveto] : [moveto, index]
+    for (let p = begin; p !== end; p = increment(p, 1)) {
+      if (p === N) continue
+      const key = docs[p]!.key
+      if (store.selected.has(key)) store.selected.delete(key)
+      else store.selected.add(key)
+    }
+  }
+  keepCursorVisibleSmooth(tr)
+  if (moveto === N) {
+    if (index > moveto) focusBreadcrumb()
+    else focusHeader()
+  }
+}
+
+const pageMove = (direction: 1 | -1, ev: KeyboardEvent) => {
+  const docs = props.documents
+  if (docs.length === 0) return
+  const scroller =
+    (document.querySelector('main') as HTMLElement | null) ?? document.documentElement
+  const currentIndex = getCursorIndex()
+  const currentEl = store.cursor ? getDocElement(store.cursor) : null
+  const currentCenter = currentEl
+    ? currentEl.getBoundingClientRect().top +
+      currentEl.getBoundingClientRect().height / 2
+    : scroller.getBoundingClientRect().top + scroller.clientHeight / 2
+  const targetCenter =
+    currentCenter + direction * Math.max(120, scroller.clientHeight - 140)
+
+  let bestIndex = direction > 0 ? docs.length - 1 : 0
+  let bestDistance = Number.POSITIVE_INFINITY
+  for (let i = 0; i < docs.length; i++) {
+    if (
+      currentIndex !== docs.length &&
+      ((direction > 0 && i <= currentIndex) || (direction < 0 && i >= currentIndex))
+    )
+      continue
+    const el = getDocElement(docs[i]!.key)
+    if (!el) continue
+    const center =
+      el.getBoundingClientRect().top + el.getBoundingClientRect().height / 2
+    const distance = Math.abs(center - targetCenter)
+    if (distance < bestDistance) {
+      bestDistance = distance
+      bestIndex = i
+    }
+  }
+  markKeyboardFollow()
+  moveCursorTo(bestIndex, ev)
+}
+
 defineExpose({
+  newFile() {
+    const now = Math.floor(Date.now() / 1000)
+    editing.value = new Doc({
+      loc: loc.value,
+      key: 'new',
+      name: 'New File.txt',
+      dir: false,
+      mtime: now,
+      size: 0,
+      allocated: 0
+    })
+    store.cursor = editing.value.key
+  },
   newFolder() {
     const now = Math.floor(Date.now() / 1000)
     editing.value = new Doc({
@@ -127,23 +324,42 @@ defineExpose({
     } else {
       store.selected.add(key)
     }
+    markKeyboardFollow()
     this.cursorMove(1, null)
   },
   up(ev: KeyboardEvent) {
+    markKeyboardFollow()
     this.cursorMove(-columns.value, ev)
   },
   down(ev: KeyboardEvent) {
+    markKeyboardFollow()
     this.cursorMove(columns.value, ev)
   },
   left(ev: KeyboardEvent) {
+    markKeyboardFollow()
     this.cursorMove(-1, ev)
   },
   right(ev: KeyboardEvent) {
+    markKeyboardFollow()
     this.cursorMove(1, ev)
   },
+  pageUp(ev: KeyboardEvent) {
+    pageMove(-1, ev)
+  },
+  pageDown(ev: KeyboardEvent) {
+    pageMove(1, ev)
+  },
+  home(ev: KeyboardEvent) {
+    if (!props.documents.length) return
+    markKeyboardFollow()
+    moveCursorTo(0, ev)
+  },
+  end(ev: KeyboardEvent) {
+    if (!props.documents.length) return
+    markKeyboardFollow()
+    moveCursorTo(props.documents.length - 1, ev)
+  },
   cursorMove(d: number, ev: KeyboardEvent | null) {
-    const select = !!ev?.shiftKey
-    // Move cursor up or down (keyboard navigation)
     const docs = props.documents
     if (docs.length === 0) {
       store.cursor = ''
@@ -152,7 +368,7 @@ defineExpose({
     const N = docs.length
     const mod = (a: number, b: number) => ((a % b) + b) % b
     const increment = (i: number, d: number) => mod(i + d, N + 1)
-    const index = store.cursor ? docs.findIndex(doc => doc.key === store.cursor) : N
+    const index = getCursorIndex()
     // Stop navigation sideways away from the grid (only with up/down)
     if (ev && index === 0 && ev.key === 'ArrowLeft') return
     if (ev && index === N - 1 && ev.key === 'ArrowRight') return
@@ -164,31 +380,7 @@ defineExpose({
       // Wrapping either end, just land outside the list
       if (Math.abs(d) >= N || Math.sign(d) !== Math.sign(moveto - index)) moveto = N
     }
-    store.cursor = docs[moveto]?.key ?? ''
-    const tr = store.cursor ? document.getElementById(`file-${store.cursor}`) : ''
-    if (select) {
-      // Go forwards, possibly wrapping over the end; the last entry is not toggled
-      let [begin, end] = d > 0 ? [index, moveto] : [moveto, index]
-      for (let p = begin; p !== end; p = increment(p, 1)) {
-        if (p === N) continue
-        const key = docs[p]!.key
-        if (store.selected.has(key)) store.selected.delete(key)
-        else store.selected.add(key)
-      }
-    }
-    // @ts-ignore
-    scrolltr = tr
-    if (!scrolltimer) {
-      scrolltimer = setTimeout(() => {
-        if (scrolltr) scrolltr.scrollIntoView({ block: 'center', behavior: 'smooth' })
-        scrolltimer = null
-      }, 300)
-    }
-    // When leaving the file list: up goes to breadcrumbs, down goes to header
-    if (moveto === N) {
-      if (d < 0) focusBreadcrumb()
-      else focusHeader()
-    }
+    moveCursorTo(moveto, ev)
   }
 })
 const focusHeader = () => {
@@ -201,18 +393,18 @@ const focusBreadcrumb = () => {
   const el = document.querySelector('.breadcrumb') as HTMLElement | null
   if (el) el.focus()
 }
-let scrolltimer: any = null
-let scrolltr: any = null
+const keyboardFollowScroll = createKeyboardFollowScroll()
+const markKeyboardFollow = keyboardFollowScroll.markKeyboardFollow
+const keepCursorVisibleSmooth = keyboardFollowScroll.keepVisible
 watchEffect(() => {
   if (store.cursor && store.cursor !== editing.value?.key) editing.value = null
   if (editing.value) store.cursor = editing.value.key
-  if (store.cursor) {
+  if (store.cursor && !editing.value) {
     const a = document.querySelector(
       `#file-${store.cursor}`
     ) as HTMLAnchorElement | null
     if (a) {
-      a.focus()
-      a.scrollIntoView({ block: 'center', behavior: 'smooth' })
+      a.focus({ preventScroll: true })
     }
   }
 })
@@ -223,34 +415,74 @@ watchEffect(() => {
   }
 })
 let resizeObserver: ResizeObserver | null = null
+const attachGalleryObservers = () => {
+  if (!gallery.value || resizeObserver) return
+  resizeObserver = new ResizeObserver(updateColumns)
+  resizeObserver.observe(gallery.value)
+  gallery.value.addEventListener('load', onImgLoad, { capture: true })
+}
+
+const detachGalleryObservers = () => {
+  resizeObserver?.disconnect()
+  resizeObserver = null
+  gallery.value?.removeEventListener('load', onImgLoad, { capture: true })
+}
+
 onMounted(() => {
   const active = document.querySelector('.cursor') as HTMLElement | null
   if (active) {
-    active.scrollIntoView({ block: 'center', behavior: 'instant' })
-    active.focus()
+    active.focus({ preventScroll: true })
   }
   updateColumns()
-  if (gallery.value) {
-    resizeObserver = new ResizeObserver(updateColumns)
-    resizeObserver.observe(gallery.value)
-  }
+  seedFromDocs()
+  attachGalleryObservers()
+})
+onActivated(() => {
+  nextTick(() => {
+    updateColumns()
+    attachGalleryObservers()
+  })
+})
+onDeactivated(() => {
+  detachGalleryObservers()
 })
 onUnmounted(() => {
-  resizeObserver?.disconnect()
+  keyboardFollowScroll.cancel()
+  detachGalleryObservers()
 })
-const mkdir = async (doc: Doc, name: string) => {
+
+// Re-seed aspect ratios whenever docs update (e.g., ar patch from server)
+watch(() => props.documents, seedFromDocs)
+const editRoute = (path: string) =>
+  '/' +
+  path
+    .split('/')
+    .map(part => encodeURIComponent(part))
+    .join('/')
+
+const createItem = async (doc: Doc, name: string) => {
   doc.name = name
   doc.key = crypto.randomUUID()
   store.addGhost(doc)
   editing.value = null
   const path = doc.loc ? `${doc.loc}/${name}` : name
   try {
-    const res = await apiFetch(filesUrl(path), { method: 'MKCOL' })
+    const res = doc.dir
+      ? await apiFetch(filesUrl(path), { method: 'MKCOL' })
+      : await apiFetch(filesUrl(path), {
+          method: 'PUT',
+          body: '',
+          headers: { 'Content-Type': 'text/plain; charset=utf-8' }
+        })
     if (!res.ok) throw new Error(await parseErrorMessage(res))
-    router.push(doc.urlrouter)
+    if (doc.dir) {
+      router.push(doc.urlrouter)
+    } else {
+      router.push(editRoute(path))
+    }
   } catch (err) {
-    console.error('Mkdir failed', err)
-    store.showToast(err instanceof Error ? err.message : 'Mkdir failed')
+    console.error('Create failed', err)
+    store.showToast(err instanceof Error ? err.message : 'Create failed')
   }
 }
 const showFolderBreadcrumb = (i: number) => {

frontend/src/components/GalleryFigure.vue

@@ -10,21 +10,33 @@
   >
     <figure>
       <slot></slot>
-      <MediaPreview ref=m :doc="doc" tabindex=-1 quality="sz=512" class="figcontent" />
+      <MediaPreview :key="snap.ext" ref=m :doc="doc" tabindex=-1 quality="sz=512" class="figcontent" />
       <div class="titlespacer"></div>
       <figcaption @click.prevent @contextmenu.prevent="$emit('menu', $event)">
         <template v-if="editing">
-          <FileRenameInput :doc=doc :rename=editing.rename :exit=editing.exit />
+          <SelectBox :doc=doc @click="store.cursor = doc.key"/>
+          <div class="filename-row rename-row">
+            <div class="rename-wrap">
+              <FileRenameInput :doc=doc :rename=editing.rename :exit=editing.exit />
+            </div>
+          </div>
+          <div class=namespacer></div>
         </template>
         <template v-else>
           <SelectBox :doc=doc @click="store.cursor = doc.key"/>
-          <span>{{ doc.name }}<SparseIndicator :doc="doc" class="after-name" /></span>
+          <div class="filename-row">
+            <span class="filename-group">
+              <span class="filename">{{ snap.displayName }}<SparseIndicator :doc="doc" class="after-name" /></span>
+              <span v-if="snap.ext" class="file-ext">.{{ snap.ext }}</span>
+            </span>
+            <button class="rename-btn" @click="$emit('rename')" title="Rename">✏️</button>
+          </div>
           <div class=namespacer></div>
         </template>
       </figcaption>
     </figure>
     <CursorTooltip ref="tooltip" :text="tooltipText">
-      <div class="tooltip-name">{{ doc.name }}</div>
+      <div class="tooltip-name">{{ snap.name }}</div>
       <div class="tooltip-details">{{ doc.modified }} — {{ doc.sizedisp }}</div>
       <div v-if="doc.sparseIndicator" class="tooltip-sparse">{{ sparseText }}</div>
     </CursorTooltip>
@@ -37,12 +49,14 @@ import { Doc } from '@/repositories/Document'
 import { useMainStore } from '@/stores/main'
 import { formatSize } from '@/utils'
 import { computed, ref } from 'vue'
+import { useRouter } from 'vue-router'
 import CursorTooltip from './CursorTooltip.vue'
 import SparseIndicator from './SparseIndicator.vue'
 
 const store = useMainStore()
+const router = useRouter()
 type EditingProp = {
-  rename: (name: string) => void
+  rename: (doc: Doc, newName: string) => void
   exit: () => void
 }
 
@@ -60,8 +74,27 @@ const sparseText = computed(() => {
   return `${formatSize(allocated)} allocated of ${formatSize(size)}`
 })
 
+// Single subscription to docVersion; all doc-derived values come from here.
+// This is needed because Doc instances are non-reactive plain objects, so
+// mutating doc.name alone won't invalidate computed caches.
+const snap = computed(() => {
+  void store.docVersion
+  const { name, ext } = props.doc
+  const base = ext ? name.slice(0, name.length - ext.length - 1) : name
+  return {
+    name,
+    ext,
+    displayName: base.replace(/[_.]+/g, ' ')
+  }
+})
+
 const onclick = (ev: Event) => {
-  if (m.value!.play()) ev.preventDefault()
+  if (m.value!.play()) {
+    ev.preventDefault()
+  } else if (props.doc.text) {
+    ev.preventDefault()
+    router.push(props.doc.editurl.replace('/#', ''))
+  }
   store.cursor = props.doc.key
 }
 </script>
@@ -81,8 +114,78 @@ const onclick = (ev: Event) => {
 .after-name {
   margin-left: 0.3em;
 }
+.filename-row {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  gap: 0;
+  flex: 0 1 auto;
+  min-width: 0;
+  position: relative;
+  overflow: visible;
+  max-width: calc(100% - 4.5em);
+}
+.filename-row::after {
+  content: '';
+  position: absolute;
+  left: 100%;
+  top: 0;
+  width: 1.4em;
+  height: 100%;
+}
+.filename-group {
+  display: inline-flex;
+  align-items: baseline;
+  min-width: 0;
+  max-width: 100%;
+}
+.filename {
+  cursor: default;
+  padding: .5em 0;
+  color: #fff;
+  font-size: 0.8em;
+  font-weight: 600;
+  text-shadow: 0 0 .2em #000, 0 0 .2em #000;
+  text-wrap: nowrap;
+  text-overflow: ellipsis;
+  overflow: hidden;
+  flex: 0 1 auto;
+  min-width: 0;
+}
+.file-ext {
+  color: rgba(255, 255, 255, 0.8);
+  font-size: 0.8em;
+  font-weight: 600;
+  text-shadow: 0 0 .2em #000, 0 0 .2em #000;
+  padding: 0 .15em 0 0;
+  white-space: nowrap;
+  flex: 0 0 auto;
+}
+.rename-btn {
+  position: absolute;
+  left: 100%;
+  top: 50%;
+  transform: translate(0.2em, -50%);
+  z-index: 2;
+  background: none;
+  border: none;
+  padding: 0;
+  cursor: pointer;
+  font-size: 0.8em;
+  line-height: 1;
+  opacity: 0;
+  visibility: hidden;
+  pointer-events: none;
+  transition: opacity 0.12s ease;
+}
+.filename-row:hover .rename-btn {
+  opacity: 1;
+  visibility: visible;
+  pointer-events: auto;
+}
 figure {
-  max-height: 15em;
+  height: var(--gallery-figure-height, 15em);
+  max-height: var(--gallery-figure-height, 15em);
   position: relative;
   border-radius: .5em;
   overflow: hidden;
@@ -92,12 +195,13 @@ figure {
   align-items: center;
   justify-content: center;
   overflow: hidden;
+  transition: height 0.4s ease, max-height 0.4s ease;
 }
 figure > article {
   flex: 0 0 auto;
 }
 figure :deep(.video-container) {
-  height: 15em;
+  height: var(--gallery-figure-height, 15em);
 }
 .titlespacer {
   flex-shrink: 100000;
@@ -114,9 +218,9 @@ figcaption {
   width: 100%;
 }
 figcaption input[type='checkbox'] {
-  width: 1.5em;
-  height: 1.5em;
-  margin: .25em 0 .25em .25em;
+  width: 1.1em;
+  height: 1.1em;
+  margin: .25em .4em .25em .35em;
   opacity: 0;
   flex-shrink: 0;
   transition: opacity var(--transition-time) ease-in-out;
@@ -124,17 +228,10 @@ figcaption input[type='checkbox'] {
 figcaption input[type='checkbox']:checked, figcaption:hover input[type='checkbox'] {
   opacity: 1;
 }
-figcaption span {
-  cursor: default;
-  padding: .5em;
-  color: #fff;
-  font-weight: 600;
-  text-shadow: 0 0 .2em #000, 0 0 .2em #000;
-  text-wrap: nowrap;
-  text-overflow: ellipsis;
-  overflow: hidden;
+.cursor .filename {
+  color: var(--accent-color);
 }
-.cursor figcaption span {
+.cursor .file-ext {
   color: var(--accent-color);
 }
 figcaption .namespacer {
@@ -142,4 +239,17 @@ figcaption .namespacer {
   height: 2em;
   width: 2em;
 }
+.rename-wrap {
+  font-size: 0.8em;
+  width: auto;
+  min-width: 0;
+  max-width: 100%;
+}
+.rename-row {
+  max-width: calc(100% - 4.5em);
+}
+.rename-wrap :deep(#FileRenameInput) {
+  min-width: 0;
+  max-width: 100%;
+}
 </style>

frontend/src/components/HeaderMain.vue

@@ -1,30 +1,43 @@
 <template>
   <nav class="headermain buttons">
-    <UploadButton :path="props.path" />
-    <SvgButton
-      name="create-folder"
-      tooltip="New folder"
-      @click="() => { store.fileExplorer!.newFolder() }"
-    />
-    <div class="smallgap"></div>
-    <SvgButton name="eye" @click="store.prefs.gallery = !store.prefs.gallery" tooltip="Details/Gallery" />
-    <div class="search-group">
-      <SvgButton name="find" tabindex="-1" @click="focusSearch" tooltip="Search" />
-      <input
-        ref="search"
-        type="search"
-        :value="query"
-        @input="updateSearch"
-        @keydown.escape="clearSearch"
+    <template v-if="!props.editorMode">
+      <UploadButton :path="props.path" />
+      <SvgButton
+        name="create-file"
+        tooltip="New file"
+        @click="() => { store.fileExplorer!.newFile() }"
       />
-      <span v-if="!query" class="search-hint" @click="focusSearch">{{ store.prefs.searchHotkey }}</span>
-    </div>
-    <div v-if="showSortHints" class="sort-hints">
+      <SvgButton
+        name="create-folder"
+        tooltip="New folder"
+        @click="() => { store.fileExplorer!.newFolder() }"
+      />
+      <div class="smallgap"></div>
+      <SvgButton name="eye" @click="store.prefs.gallery = !store.prefs.gallery" tooltip="Details/Gallery" />
+      <div class="search-group">
+        <SvgButton name="find" tabindex="-1" @click="focusSearch" tooltip="Search" />
+        <input
+          ref="search"
+          type="search"
+          :value="query"
+          @input="updateSearch"
+          @keydown.escape="clearSearch"
+        />
+        <span v-if="!query" class="search-hint" @click="focusSearch">{{ store.prefs.searchHotkey }}</span>
+      </div>
+    </template>
+    <div v-if="!props.editorMode && showSortHints" class="sort-hints">
       <span class="sort-label">Order</span>
       <span class="keycap">1</span>
       <span class="keycap">2</span>
       <span class="keycap">3</span>
     </div>
+    <SvgButton
+      v-if="props.editorMode"
+      name="disk"
+      tooltip="Save (Ctrl/Cmd+S)"
+      @click="store.editorSave?.()"
+    />
     <div class="spacer smallgap"></div>
     <DiskSpace v-if="store.space.disk" />
     <SvgButton name="cog" @click="settingsMenu" />
@@ -49,6 +62,7 @@ const textInputFocused = ref(false)
 const props = defineProps<{
   path: Array<string>
   query: string
+  editorMode?: boolean
 }>()
 
 const isInputElement = (el: Element | null): boolean => {
@@ -164,6 +178,14 @@ const settingsMenu = (e: Event) => {
       }
     })
   }
+
+  items.push({
+    label: 'ℹ️ About Cista...',
+    onClick: () => {
+      store.dialog = 'about'
+    }
+  })
+
   ContextMenu.showContextMenu({
     // @ts-ignore
     x: e.target.getBoundingClientRect().right,

frontend/src/components/MediaPreview.vue

@@ -1,9 +1,35 @@
 <template>
-  <div v-if=showProgress() class="preview-progress" aria-label="Preview pending">
-    <SpinnerIcon />
+  <div v-if="showPreviewImage || showNativeImage" class="preview-image-shell">
+    <span
+      v-show="activeImageLoading"
+      class="file icon"
+      :class="[`ext-${doc.ext}`, 'loading-pulse']"
+      :style="loadingPulseStyle"
+    ></span>
+    <img
+      v-if="showPreviewImage"
+      :src="previewSrc"
+      alt=""
+      :class="{ ready: !previewImageLoading }"
+      @load="onPreviewImageLoad"
+      @error="onPreviewImageError"
+    >
+    <img
+      v-else
+      :src="doc.url"
+      alt=""
+      :class="{ ready: !nativeImageLoading }"
+      @load="onNativeImageLoad"
+      @error="onNativeImageError"
+    >
+  </div>
+  <div v-else-if=showProgress() class="preview-progress" aria-label="Preview pending">
+    <span
+      class="file icon"
+      :class="[`ext-${doc.ext}`, { 'loading-pulse': !previewLoadFailed }]"
+      :style="loadingPulseStyle"
+    ></span>
   </div>
-  <img v-else-if="previewSrc && !video() && !audio()" :src="previewSrc" alt="">
-  <img v-else-if=doc.img :src=doc.url alt="">
   <span v-else-if=doc.dir class="folder icon"></span>
   <div v-else-if=video() class="video-container" :class="{ pending: !doc.complete }">
     <video v-if=doc.complete ref=vid :src=doc.url :poster=previewSrc preload=none @play=onplay @pause=onpaused @ended=next @seeking=media!.play()></video>
@@ -18,10 +44,10 @@
 </template>
 
 <script setup lang="ts">
-import { Play as PlayIcon, Spinner as SpinnerIcon } from '@/assets/svg'
+import { Play as PlayIcon } from '@/assets/svg'
 import type { Doc } from '@/repositories/Document'
 import { useMainStore } from '@/stores/main'
-import { computed, ref } from 'vue'
+import { computed, ref, watch } from 'vue'
 
 const aud = ref<HTMLAudioElement | null>(null)
 const vid = ref<HTMLVideoElement | null>(null)
@@ -30,11 +56,58 @@ const props = defineProps<{
   doc: Doc
   quality: string
 }>()
+const previewImageFailed = ref(false)
+const nativeImageFailed = ref(false)
+const previewImageLoading = ref(true)
+const nativeImageLoading = ref(true)
 const previewSrc = computed(() =>
   props.doc.previewurl
     ? `${props.doc.previewurl}?${props.quality}&t=${props.doc.mtime}`
     : ''
 )
+const showPreviewImage = computed(
+  () => !!previewSrc.value && !video() && !audio() && !previewImageFailed.value
+)
+const showNativeImage = computed(() => props.doc.img && !nativeImageFailed.value)
+const activeImageLoading = computed(() =>
+  showPreviewImage.value ? previewImageLoading.value : nativeImageLoading.value
+)
+const previewLoadFailed = computed(
+  () => previewImageFailed.value || nativeImageFailed.value
+)
+const loadingPulseDelayMs = computed(() => {
+  let hash = 0
+  for (const ch of props.doc.key) hash = (hash * 31 + ch.charCodeAt(0)) >>> 0
+  return hash % 1800
+})
+const loadingPulseStyle = computed(() => ({
+  animationDelay: `${-loadingPulseDelayMs.value}ms`
+}))
+
+const onPreviewImageLoad = () => {
+  previewImageLoading.value = false
+}
+const onPreviewImageError = () => {
+  previewImageLoading.value = false
+  previewImageFailed.value = true
+}
+const onNativeImageLoad = () => {
+  nativeImageLoading.value = false
+}
+const onNativeImageError = () => {
+  nativeImageLoading.value = false
+  nativeImageFailed.value = true
+}
+
+watch(
+  () => props.doc.key,
+  () => {
+    previewImageFailed.value = false
+    nativeImageFailed.value = false
+    previewImageLoading.value = true
+    nativeImageLoading.value = true
+  }
+)
 
 const onplay = () => {
   if (!media.value) return
@@ -154,6 +227,7 @@ img, embed, .icon, audio, video {
   border-radius: calc(.5em / 8);
 }
 .preview-progress {
+  position: relative;
   display: flex;
   align-items: center;
   justify-content: center;
@@ -162,18 +236,47 @@ img, embed, .icon, audio, video {
   max-height: 100%;
   aspect-ratio: 1;
 }
-.preview-progress :deep(svg) {
-  width: 4.5em;
-  height: 4.5em;
-  opacity: 0.8;
-  animation: media-preview-spin 0.9s linear infinite;
+.preview-progress .icon {
+  opacity: 0.9;
 }
-@keyframes media-preview-spin {
-  from {
-    transform: rotate(0deg);
+.preview-image-shell {
+  position: relative;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  width: 100%;
+  height: 100%;
+  max-width: 100%;
+  max-height: 100%;
+}
+.preview-image-shell img {
+  position: absolute;
+  inset: 0;
+  width: 100%;
+  height: 100%;
+  min-width: 0;
+  object-fit: contain;
+  opacity: 0;
+  transition: opacity 0.2s ease-in-out;
+}
+.preview-image-shell img.ready {
+  opacity: 1;
+}
+.loading-pulse {
+  animation: media-preview-pulse 1.8s ease-in-out infinite;
+}
+@keyframes media-preview-pulse {
+  0% {
+    transform: scale(1);
+    opacity: 0.86;
   }
-  to {
-    transform: rotate(360deg);
+  50% {
+    transform: scale(1.04);
+    opacity: 0.98;
+  }
+  100% {
+    transform: scale(1);
+    opacity: 0.86;
   }
 }
 .folder::before {
@@ -219,12 +322,6 @@ img, embed, .icon, audio, video {
 figure.cursor .icon {
   filter: brightness(1);
 }
-img::before {
-  /* broken image */
-  text-shadow: 0 0 .5rem #000;
-  filter: grayscale(1);
-  content: '❌';
-}
 .video-container {
   position: relative;
   display: flex;

frontend/src/components/ModalDialog.vue

@@ -15,15 +15,55 @@
 <script setup lang="ts">
 import { useMainStore } from '@/stores/main'
 import { holdGlobalBackdrop, releaseGlobalBackdrop } from 'paskia'
-import { nextTick, ref, watchEffect } from 'vue'
+import { nextTick, onBeforeUnmount, ref, watch, watchEffect } from 'vue'
 
 const overlay = ref<HTMLDivElement | null>(null)
 const dialog = ref<HTMLDivElement | null>(null)
 const store = useMainStore()
+let backdropHeld = false
+
+const ensureGlobalBackdropStyles = () => {
+  if (typeof document === 'undefined') return
+  if (document.getElementById('paskia-dialog')) return
+  const style = document.createElement('style')
+  style.id = 'paskia-dialog'
+  style.textContent = `body::before {
+  content: '';
+  position: fixed;
+  inset: 0;
+  z-index: 1099;
+  background: transparent;
+  backdrop-filter: blur(0) brightness(1);
+  -webkit-backdrop-filter: blur(0) brightness(1);
+  pointer-events: none;
+  visibility: hidden;
+  transition: all 0.2s ease-out;
+}
+body.paskia-backdrop::before {
+  -webkit-backdrop-filter: blur(.2rem) brightness(0.5);
+  backdrop-filter: blur(.2rem) brightness(0.5);
+  visibility: visible;
+}
+body.paskia-backdrop {
+  overflow: auto;
+}
+#paskia-iframe {
+  border: none;
+  position: fixed;
+  top: 0;
+  left: 0;
+  width: 100%;
+  height: 100%;
+  z-index: 9999;
+  color-scheme: auto;
+  background: transparent;
+}
+`
+  document.head.insertBefore(style, document.head.firstChild)
+}
 
 const close = () => {
   store.dialog = ''
-  releaseGlobalBackdrop()
 }
 
 const props = defineProps<{
@@ -33,7 +73,6 @@ const props = defineProps<{
 
 const show = () => {
   store.dialog = props.name
-  holdGlobalBackdrop()
   nextTick(() => {
     overlay.value?.focus()
     const input = dialog.value?.querySelector('input')
@@ -41,6 +80,29 @@ const show = () => {
   })
 }
 defineExpose({ show, close })
+
+watch(
+  () => store.dialog === props.name,
+  isOpen => {
+    if (isOpen && !backdropHeld) {
+      ensureGlobalBackdropStyles()
+      holdGlobalBackdrop()
+      backdropHeld = true
+    } else if (!isOpen && backdropHeld) {
+      releaseGlobalBackdrop()
+      backdropHeld = false
+    }
+  },
+  { immediate: true }
+)
+
+onBeforeUnmount(() => {
+  if (backdropHeld) {
+    releaseGlobalBackdrop()
+    backdropHeld = false
+  }
+})
+
 watchEffect(() => {
   if (overlay.value) {
     overlay.value.focus()

frontend/src/components/SelectionToolbar.vue

@@ -15,11 +15,11 @@
     </div>
     <span class="select-size">{{ selectionDisplay.size }}</span>
     <DownloadButton />
-    <button
-      class="action-button"
-      title="Copy share link (Alt-click for read/write)"
+    <SvgButton
+      name="link"
+      tooltip="Copy share link (Alt-click for read/write)"
       @click="copyShareLink"
-    >share</button>
+    />
     <SvgButton name="copy" tooltip="Copy here" @click="op('cp', dst)" />
     <SvgButton name="paste" tooltip="Move here" @click="op('mv', dst)" />
     <SvgButton name="trash" tooltip="Delete ⚠️" @click="op('rm')" />
@@ -29,7 +29,7 @@
       @mouseenter="unselectTooltip?.startHover"
       @mousemove="unselectTooltip?.updatePosition"
       @mouseleave="unselectTooltip?.endHover"
-    >✖ selection</button>
+    >✖ deselect</button>
   </div>
 </template>
 

frontend/src/components/UploadButton.vue

@@ -11,7 +11,7 @@
 import { Doc } from '@/repositories/Document'
 import { getDocuments } from '@/stores/documentStore'
 import { useMainStore } from '@/stores/main'
-import { collator } from '@/utils'
+import { collator, formatSize } from '@/utils'
 import { onMounted, onUnmounted, ref } from 'vue'
 import { useRouter } from 'vue-router'
 
@@ -44,6 +44,7 @@ type InflightBlock = {
 }
 
 const UPLOAD_BLOCK_SIZE = 16 << 20 // 16 MiB
+const UPLOAD_MARGIN_BYTES = 512 * 1024 * 1024 // 512 MiB
 function pasteHandler(event: ClipboardEvent) {
   const items = Array.from(event.clipboardData?.items ?? [])
   const infiles = [] as File[]
@@ -116,6 +117,28 @@ const uploadCloudFiles = (files: CloudFile[]) => {
   }
   if (!files.length) return
   files.sort((a, b) => collator.compare(a.cloudName, b.cloudName))
+
+  // Space check: reject the whole batch if there isn't enough free space.
+  const batchTotal = files.reduce((sum, f) => sum + f.file.size, 0)
+  const allDocs = getDocuments()
+  const docByPath = new Map<string, Doc>()
+  for (const d of allDocs) {
+    const path = d.loc ? `${d.loc}/${d.name}` : d.name
+    docByPath.set(path, d)
+  }
+  let overwriteSize = 0
+  for (const f of files) {
+    const existing = docByPath.get(f.cloudName)
+    if (existing && !existing.dir) overwriteSize += existing.size
+  }
+  const netNeed = batchTotal - overwriteSize
+  if (store.space.free < netNeed + UPLOAD_MARGIN_BYTES) {
+    store.showToast(
+      `Not enough free space (need ${formatSize(netNeed + UPLOAD_MARGIN_BYTES)}, have ${formatSize(store.space.free)})`
+    )
+    return
+  }
+
   // Optimistic update: ghost folders and files
   const now = Math.floor(Date.now() / 1000)
   const docs = getDocuments()

frontend/src/repositories/Document.ts

@@ -13,6 +13,7 @@ export type DocProps = {
   dir: boolean
   ghost?: boolean
   expires?: number // Unix timestamp for ghost expiry
+  ar?: number // Aspect ratio (height/width) from server, if known
 }
 
 export class Doc {
@@ -26,6 +27,7 @@ export class Doc {
   public expires: number = 0 // Unix timestamp for ghost expiry (0 = no expiry)
   /** @internal Use the name getter/setter instead */
   public _name: string = ''
+  public ar?: number // Aspect ratio (height/width), provided by server after first preview render
 
   constructor(props: Partial<DocProps> = {}) {
     const { name, ...rest } = props
@@ -87,6 +89,14 @@ export class Doc {
   get print(): boolean {
     return (FILE_TYPES.print as readonly string[]).includes(this.ext)
   }
+  get text(): boolean {
+    return (FILE_TYPES.text as readonly string[]).includes(this.ext)
+  }
+  get editurl(): string {
+    if (!this.text) return ''
+    const p = this.loc ? `${this.loc}/${this.name}` : this.name
+    return '/#/' + p.replaceAll('?', '%3F').replaceAll('#', '%23')
+  }
   get complete(): boolean {
     return !this.ghost && (this.dir || this.size <= this.allocated)
   }
@@ -130,7 +140,8 @@ export type FileEntry = [
   number, // mtime
   number, // size
   number, // allocated (actual disk usage)
-  number // isfile
+  number, // isfile
+  number? // ar: aspect ratio (height/width), present if known
 ]
 
 export type UpdateEntry = ['k', number] | ['d', number] | ['i', Array<FileEntry>]

frontend/src/repositories/WS.ts

@@ -164,6 +164,11 @@ const handleWatchMessage = (event: MessageEvent) => {
     case !!msg.update:
       handleUpdateMessage(msg)
       break
+    case !!msg.ar: {
+      const store = useMainStore()
+      store.updateAr(msg.ar as Record<string, number>)
+      break
+    }
     case !!msg.space:
       const store = useMainStore()
       store.space = msg.space

frontend/src/router/index.ts

@@ -1,6 +1,12 @@
+import { useMainStore } from '@/stores/main'
 import ExplorerView from '@/views/ExplorerView.vue'
 import { createRouter, createWebHashHistory } from 'vue-router'
 
+function getPathDepth(path: string): number {
+  const pathPart = decodeURIComponent(path).split('//')[0] ?? ''
+  return pathPart.split('/').filter(Boolean).length
+}
+
 const router = createRouter({
   history: createWebHashHistory(import.meta.env.BASE_URL),
   routes: [
@@ -12,4 +18,17 @@ const router = createRouter({
   ]
 })
 
+router.beforeEach((to, from) => {
+  const store = useMainStore()
+  const toDepth = getPathDepth(to.path)
+  const fromDepth = getPathDepth(from.path)
+  if (toDepth > fromDepth) {
+    store.transitionDirection = 'forward'
+  } else if (toDepth < fromDepth) {
+    store.transitionDirection = 'backward'
+  } else {
+    store.transitionDirection = 'none'
+  }
+})
+
 export default router

frontend/src/stores/main.ts

@@ -5,7 +5,7 @@ import { collator } from '@/utils'
 import { type SortOrder, sorted } from '@/utils/docsort'
 import SearchWorker from '@/workers/searchWorker?worker'
 import { type StateTree, defineStore } from 'pinia'
-import { documentRef, getDocuments, setDocuments } from './documentStore'
+import { documentRef, getDocuments, setDocuments, triggerUpdate } from './documentStore'
 
 // Singleton search worker instance
 let searchWorker: Worker | null = null
@@ -84,7 +84,7 @@ export const useMainStore = defineStore('main', {
       paskia?: boolean
       office_previews?: boolean
     },
-    dialog: '' as '' | 'settings' | 'usermgmt' | 'accessdenied' | 'tokens',
+    dialog: '' as '' | 'settings' | 'usermgmt' | 'accessdenied' | 'tokens' | 'about',
     uprogress: {} as any,
     dprogress: {} as any,
     prefs: {
@@ -98,6 +98,8 @@ export const useMainStore = defineStore('main', {
       privileged: false as boolean,
       isLoggedIn: false as boolean
     },
+    transitionDirection: 'none' as 'forward' | 'backward' | 'none',
+    editorSave: null as null | (() => void),
     space: {
       disk: 0,
       free: 0,
@@ -124,7 +126,7 @@ export const useMainStore = defineStore('main', {
     updateRoot(root: FileEntry[]) {
       const docs = []
       let loc = [] as string[]
-      for (const [level, name, key, mtime, size, allocated, isfile] of root) {
+      for (const [level, name, key, mtime, size, allocated, isfile, ar] of root) {
         loc = loc.slice(0, level - 1)
         docs.push(
           new Doc({
@@ -134,7 +136,8 @@ export const useMainStore = defineStore('main', {
             size,
             allocated,
             mtime,
-            dir: !isfile
+            dir: !isfile,
+            ar
           })
         )
         loc.push(name)
@@ -157,6 +160,22 @@ export const useMainStore = defineStore('main', {
       // Sync documents to search worker
       this.syncSearchWorker()
     },
+    /** Patch aspect ratios on existing docs from a server ar update message */
+    updateAr(arMap: Record<string, number>) {
+      const docs = getDocuments()
+      let changed = false
+      for (const doc of docs) {
+        const ar = arMap[doc.key]
+        if (ar != null && doc.ar !== ar) {
+          doc.ar = ar
+          changed = true
+        }
+      }
+      if (changed) {
+        triggerUpdate()
+        this.docVersion++
+      }
+    },
     /** Add a ghost file/folder for optimistic UI updates */
     addGhost(doc: Doc) {
       doc.ghost = true
@@ -236,6 +255,12 @@ export const useMainStore = defineStore('main', {
       }))
       worker.postMessage({ type: 'update', documents: docData })
     },
+    /** Notify UI/search that existing document objects were mutated in-place */
+    documentsChanged() {
+      triggerUpdate()
+      this.docVersion++
+      this.syncSearchWorker()
+    },
     search(query: string, loc: string) {
       const worker = getSearchWorker()
       const id = ++searchId
@@ -303,6 +328,7 @@ export const useMainStore = defineStore('main', {
       this.connected = false
       this.dialog = ''
       this.cursor = ''
+      this.editorSave = null
     },
     async logout() {
       console.log('Logout')

frontend/src/utils/fileutil.ts

@@ -5,6 +5,7 @@ export const exists = (path: string[]) => {
   const store = useMainStore()
   // Access docVersion to make this reactive
   void store.docVersion
+  if (path.length === 0) return true
   const p = path.join('/')
   return getDocuments().some(
     doc => (doc.loc ? `${doc.loc}/${doc.name}` : doc.name) === p

frontend/src/utils/index.ts

@@ -77,7 +77,65 @@ export const FILE_TYPES = {
   imageBrowser: ['avif', 'gif', 'jpg', 'jpeg', 'png', 'webp', 'svg'],
   // Images that require server-side preview (browsers cannot display them natively)
   image: ['bmp', 'heic', 'heif', 'ico', 'tif', 'tiff'],
-  print: ['epub', 'mobi', 'pdf']
+  print: ['epub', 'mobi', 'pdf'],
+  text: [
+    'txt',
+    'md',
+    'json',
+    'xml',
+    'yaml',
+    'yml',
+    'toml',
+    'ini',
+    'conf',
+    'config',
+    'cfg',
+    'log',
+    'csv',
+    'tsv',
+    'py',
+    'js',
+    'ts',
+    'jsx',
+    'tsx',
+    'html',
+    'htm',
+    'css',
+    'scss',
+    'sass',
+    'less',
+    'vue',
+    'php',
+    'rb',
+    'go',
+    'rs',
+    'java',
+    'c',
+    'cpp',
+    'h',
+    'hpp',
+    'cs',
+    'swift',
+    'kt',
+    'sh',
+    'bash',
+    'zsh',
+    'fish',
+    'ps1',
+    'bat',
+    'cmd',
+    'sql',
+    'lua',
+    'r',
+    'pl',
+    'dockerfile',
+    'makefile',
+    'gitignore',
+    'gitattributes',
+    'env',
+    'diff',
+    'patch'
+  ]
 } as const
 
 export type FileCategory = keyof typeof FILE_TYPES

frontend/src/utils/keyboardFollowScroll.ts

@@ -0,0 +1,124 @@
+type ScrollOptions = {
+  topPad?: number
+  bottomPad?: number
+  keyboardWindowMs?: number
+  getScrollContainer?: () => HTMLElement | null
+}
+
+export function createKeyboardFollowScroll(options: ScrollOptions = {}) {
+  const {
+    topPad = 84,
+    bottomPad = 84,
+    keyboardWindowMs = 260,
+    getScrollContainer = () =>
+      (document.querySelector('main') as HTMLElement | null) ?? document.documentElement
+  } = options
+
+  let scrollAnimationFrame: number | null = null
+  let scrollTargetY: number | null = null
+  let scrollVelocity = 0
+  let keyboardFollowUntil = 0
+
+  const markKeyboardFollow = () => {
+    keyboardFollowUntil = performance.now() + keyboardWindowMs
+  }
+
+  const keyboardFollowActive = () => performance.now() < keyboardFollowUntil
+
+  const clampScrollY = (y: number, scroller: HTMLElement) => {
+    const maxY = Math.max(0, scroller.scrollHeight - scroller.clientHeight)
+    return Math.min(maxY, Math.max(0, y))
+  }
+
+  const cursorScrollTarget = (el: HTMLElement): number | null => {
+    const scroller = getScrollContainer() ?? document.documentElement
+    const rect = el.getBoundingClientRect()
+    const scrollerRect = scroller.getBoundingClientRect()
+    const visibleTop = scrollerRect.top + topPad
+    const visibleBottom = scrollerRect.bottom - bottomPad
+
+    if (rect.top >= visibleTop && rect.bottom <= visibleBottom) return null
+
+    if (rect.top < visibleTop) {
+      return clampScrollY(scroller.scrollTop + (rect.top - visibleTop), scroller)
+    }
+
+    return clampScrollY(scroller.scrollTop + (rect.bottom - visibleBottom), scroller)
+  }
+
+  const runSmoothCursorScroll = () => {
+    if (scrollAnimationFrame != null) return
+
+    const step = () => {
+      const scroller = getScrollContainer() ?? document.documentElement
+
+      if (scrollTargetY == null) {
+        scrollVelocity *= 0.68
+        if (Math.abs(scrollVelocity) > 0.05) {
+          const next = clampScrollY(scroller.scrollTop + scrollVelocity, scroller)
+          scroller.scrollTop = next
+          scrollAnimationFrame = requestAnimationFrame(step)
+          return
+        }
+        scrollVelocity = 0
+        scrollAnimationFrame = null
+        return
+      }
+
+      const current = scroller.scrollTop
+      const delta = scrollTargetY - current
+      const absDelta = Math.abs(delta)
+      if (absDelta < 0.6 && Math.abs(scrollVelocity) < 0.08) {
+        scroller.scrollTop = scrollTargetY
+        scrollVelocity = 0
+        scrollTargetY = null
+        scrollAnimationFrame = null
+        return
+      }
+
+      const stiffness = Math.min(0.022, 0.01 + absDelta / 10000)
+      const damping = 0.76
+      scrollVelocity += delta * stiffness
+      scrollVelocity *= damping
+
+      const next = clampScrollY(current + scrollVelocity, scroller)
+      if (next === current) scrollVelocity = 0
+      scroller.scrollTop = next
+      scrollAnimationFrame = requestAnimationFrame(step)
+    }
+
+    scrollAnimationFrame = requestAnimationFrame(step)
+  }
+
+  const keepVisible = (el: HTMLElement | null) => {
+    if (!keyboardFollowActive()) {
+      scrollTargetY = null
+      scrollVelocity = 0
+      return
+    }
+
+    if (!el) {
+      scrollTargetY = null
+      return
+    }
+
+    const target = cursorScrollTarget(el)
+    if (target == null) {
+      scrollTargetY = null
+      return
+    }
+
+    scrollTargetY = target
+    runSmoothCursorScroll()
+  }
+
+  const cancel = () => {
+    if (scrollAnimationFrame != null) cancelAnimationFrame(scrollAnimationFrame)
+    scrollAnimationFrame = null
+    scrollTargetY = null
+    scrollVelocity = 0
+    keyboardFollowUntil = 0
+  }
+
+  return { markKeyboardFollow, keepVisible, cancel }
+}

frontend/src/views/ExplorerView.vue

@@ -1,29 +1,33 @@
 <template>
-  <Gallery
-    v-if="store.prefs.gallery"
-    ref="fileExplorer"
-    :key="`gallery-${folderPath}`"
-    :path="props.path"
-    :documents="documents"
-  />
-  <FileExplorer
-    v-else
-    ref="fileExplorer"
-    :key="`explorer-${folderPath}`"
-    :path="props.path"
-    :documents="documents"
-  />
+  <div class="transition-wrapper">
+    <Transition
+      :name="transitionName"
+      @after-enter="onAfterEnter"
+    >
+      <KeepAlive>
+        <component
+          :is="store.prefs.gallery ? Gallery : FileExplorer"
+          :key="cacheKey"
+          ref="fileExplorer"
+          class="explorer-content"
+          :path="props.path"
+          :documents="documents"
+        />
+      </KeepAlive>
+    </Transition>
+    <EmptyFolder :documents="documents" :path="props.path" />
+  </div>
   <div v-if="store.searchLoading" class="search-loading">Searching...</div>
-  <EmptyFolder :documents=documents :path=props.path />
 </template>
 
 <script setup lang="ts">
 import FileExplorer from '@/components/FileExplorer.vue'
+import Gallery from '@/components/Gallery.vue'
 import { getDocuments } from '@/stores/documentStore'
 import { useMainStore } from '@/stores/main'
 import { collator } from '@/utils'
 import { sorted, sortedGrouped } from '@/utils/docsort'
-import { computed, ref, watch, watchEffect } from 'vue'
+import { computed, nextTick, ref, watch, watchEffect } from 'vue'
 
 const store = useMainStore()
 const fileExplorer = ref()
@@ -34,6 +38,29 @@ const props = defineProps<{
 
 // Folder path for component keys - only recreate component when folder changes, not search
 const folderPath = computed(() => props.path.join('/'))
+const cacheKey = computed(() => `${store.prefs.gallery ? 'gallery' : 'list'}:${folderPath.value}`)
+
+const transitionName = computed(() => {
+  if (store.transitionDirection === 'forward') return 'slide-forward'
+  if (store.transitionDirection === 'backward') return 'slide-backward'
+  return ''
+})
+
+const folderScrollTop = new Map<string, number>()
+const scrollKey = (path: string) => path || '/'
+const getMainScroller = () => document.querySelector('main') as HTMLElement | null
+
+const restoreScroll = (path: string) => {
+  const scroller = getMainScroller()
+  if (!scroller) return
+  const top = folderScrollTop.get(scrollKey(path)) ?? 0
+  scroller.scrollTop = top
+}
+
+const onAfterEnter = () => {
+  store.transitionDirection = 'none'
+  restoreScroll(folderPath.value)
+}
 
 // Handle route-based search changes (back/forward navigation, direct URL)
 // Skip if store.query already matches (means we triggered this via typing)
@@ -87,6 +114,19 @@ watchEffect(() => {
   store.fileExplorer = fileExplorer.value
 })
 
+watch(
+  folderPath,
+  async (path, oldPath) => {
+    const scroller = getMainScroller()
+    if (scroller && oldPath !== undefined) {
+      folderScrollTop.set(scrollKey(oldPath), scroller.scrollTop)
+    }
+    await nextTick()
+    requestAnimationFrame(() => restoreScroll(path))
+  },
+  { immediate: true }
+)
+
 // Only auto-switch gallery mode when entering a new folder or on initial file list load
 watch(
   [() => props.path.join('/'), () => store.documentCount],

frontend/src/views/TextEditorView.vue

@@ -0,0 +1,256 @@
+<template>
+  <div class="text-editor">
+    <div class="editor-body">
+      <div v-if="loading" class="status">Loading…</div>
+      <div v-else-if="error" class="status error">{{ error }}</div>
+      <div v-else ref="editorHost" class="editor-host"></div>
+    </div>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { indentWithTab } from '@codemirror/commands'
+import { LanguageDescription } from '@codemirror/language'
+import { languages } from '@codemirror/language-data'
+import { Compartment, EditorState } from '@codemirror/state'
+import { oneDark } from '@codemirror/theme-one-dark'
+import { EditorView, keymap } from '@codemirror/view'
+import { basicSetup } from 'codemirror'
+import { apiFetch } from '@/repositories/Client'
+import { useMainStore } from '@/stores/main'
+import {
+  computed,
+  nextTick,
+  onActivated,
+  onDeactivated,
+  onMounted,
+  onUnmounted,
+  ref
+} from 'vue'
+import { useRoute } from 'vue-router'
+
+const route = useRoute()
+const store = useMainStore()
+
+const MAX_SIZE = 1024 * 1024 // 1 MiB
+
+const filePath = computed(() => {
+  const raw = decodeURIComponent(route.path).split('//')[0] ?? ''
+  return raw.replace(/^\//, '').replace(/\/$/, '')
+})
+const filename = computed(() => filePath.value.split('/').pop() || '')
+
+const filesUrl = computed(() => {
+  return (
+    '/files/' +
+    filePath.value
+      .split('/')
+      .map(part => encodeURIComponent(part))
+      .join('/')
+  )
+})
+
+const content = ref('')
+const original = ref('')
+const loading = ref(true)
+const saving = ref(false)
+const error = ref('')
+const editorHost = ref<HTMLDivElement | null>(null)
+let editorView: EditorView | null = null
+const languageCompartment = new Compartment()
+
+const dirty = computed(() => content.value !== original.value)
+
+const beforeUnload = (event: BeforeUnloadEvent) => {
+  if (!dirty.value) return
+  event.preventDefault()
+  event.returnValue = ''
+}
+
+let beforeUnloadActive = false
+
+const activateEditorBindings = () => {
+  store.editorSave = save
+  if (!beforeUnloadActive) {
+    window.addEventListener('beforeunload', beforeUnload)
+    beforeUnloadActive = true
+  }
+}
+
+const deactivateEditorBindings = () => {
+  if (store.editorSave === save) {
+    store.editorSave = null
+  }
+  if (beforeUnloadActive) {
+    window.removeEventListener('beforeunload', beforeUnload)
+    beforeUnloadActive = false
+  }
+}
+
+const detectLanguage = async () => {
+  const language = LanguageDescription.matchFilename(languages, filename.value)
+  if (!language) return []
+  try {
+    return [await language.load()]
+  } catch {
+    return []
+  }
+}
+
+const initEditor = async (text: string) => {
+  if (!editorHost.value) return
+  const languageExtensions = await detectLanguage()
+  const state = EditorState.create({
+    doc: text,
+    extensions: [
+      basicSetup,
+      oneDark,
+      languageCompartment.of(languageExtensions),
+      EditorView.updateListener.of(update => {
+        if (update.docChanged) {
+          content.value = update.state.doc.toString()
+        }
+      }),
+      keymap.of([
+        {
+          key: 'Mod-s',
+          run: () => {
+            void save()
+            return true
+          }
+        },
+        indentWithTab
+      ])
+    ]
+  })
+  editorView = new EditorView({ state, parent: editorHost.value })
+  editorView.focus()
+}
+
+const save = async () => {
+  if (saving.value || loading.value) return
+  saving.value = true
+  try {
+    const res = await apiFetch(filesUrl.value, {
+      method: 'PUT',
+      body: content.value,
+      headers: { 'Content-Type': 'text/plain; charset=utf-8' }
+    })
+    if (!res.ok) {
+      const data = await res.json().catch(() => ({}))
+      throw new Error(data.message || data.detail || `${res.status} ${res.statusText}`)
+    }
+    original.value = content.value
+    store.showToast(`Saved ${filename.value}`)
+  } catch (err) {
+    console.error('Save failed', err)
+    store.showToast(err instanceof Error ? err.message : 'Save failed')
+  } finally {
+    saving.value = false
+  }
+}
+
+onMounted(async () => {
+  activateEditorBindings()
+  loading.value = true
+  error.value = ''
+  try {
+    const res = await fetch(filesUrl.value, { method: 'HEAD' })
+    if (!res.ok) throw new Error(`${res.status} ${res.statusText}`)
+    const size = Number(res.headers.get('content-length') || '0')
+    if (size > MAX_SIZE) {
+      throw new Error(
+        `File is too large to edit (${(size / 1024 / 1024).toFixed(1)} MB)`
+      )
+    }
+    const textRes = await fetch(filesUrl.value)
+    if (!textRes.ok) throw new Error(`${textRes.status} ${textRes.statusText}`)
+    const text = await textRes.text()
+    content.value = text
+    original.value = text
+    loading.value = false
+    await nextTick()
+    await initEditor(text)
+  } catch (err) {
+    error.value = err instanceof Error ? err.message : 'Failed to load file'
+  }
+  finally {
+    if (loading.value) loading.value = false
+  }
+})
+
+onActivated(() => {
+  activateEditorBindings()
+})
+
+onDeactivated(() => {
+  deactivateEditorBindings()
+})
+
+onUnmounted(() => {
+  deactivateEditorBindings()
+  editorView?.destroy()
+  editorView = null
+})
+</script>
+
+<style scoped>
+.text-editor {
+  display: flex;
+  flex-direction: column;
+  height: 100%;
+  background: #1a1a1a;
+  color: #ddd;
+  text-align: left;
+}
+.editor-body {
+  flex: 1;
+  min-height: 0;
+  display: flex;
+  flex-direction: column;
+}
+.editor-host {
+  flex: 1;
+  min-height: 0;
+}
+.editor-host :deep(.cm-editor) {
+  flex: 1;
+  height: 100%;
+  border: none;
+  outline: none;
+}
+.editor-host :deep(.cm-scroller) {
+  font-family: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, monospace;
+  font-size: 0.875rem;
+  line-height: 1.5;
+  text-align: left;
+}
+.editor-host :deep(.cm-content) {
+  padding: 1rem;
+  text-align: left;
+}
+.editor-host :deep(.cm-selectionBackground) {
+  background: var(--soft-color, #146) !important;
+}
+.editor-host :deep(.cm-focused .cm-selectionBackground) {
+  background: var(--soft-color, #146) !important;
+}
+.editor-host :deep(.cm-content ::selection) {
+  background: var(--soft-color, #146);
+}
+.editor-host :deep(.cm-content, .cm-gutter) {
+  font-family: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, monospace;
+}
+.editor-host :deep(.cm-line, .cm-gutters, .cm-gutterElement) {
+  text-align: left;
+}
+.status {
+  padding: 2rem;
+  text-align: center;
+  font-size: 1rem;
+  color: #888;
+}
+.status.error {
+  color: #f55;
+}
+</style>

tests/test_disk_space.py

@@ -0,0 +1,65 @@
+import errno
+from pathlib import Path
+from typing import NamedTuple
+from unittest.mock import patch
+from uuid import uuid4
+
+import pytest
+import pytest_asyncio
+from sanic import Sanic
+
+from cista import config, watching
+from cista.api import fileserver
+from cista.fileserver import bp as fileserver_bp
+
+
+class Usage(NamedTuple):
+    total: int
+    used: int
+    free: int
+
+
+def _low_disk_usage(*args, **kwargs):
+    return Usage(total=1000, used=900, free=10)
+
+
+@pytest.fixture
+def setup_storage(tmp_path: Path):
+    config.config = config.Config(path=tmp_path, listen=":0", public=True)
+    watching.state.root = []
+    watching.rootpath = tmp_path
+    yield tmp_path
+    watching.state.root = []
+
+
+@pytest_asyncio.fixture()
+async def client(setup_storage: Path):
+    app = Sanic(f"disk-space-test-{uuid4().hex}", strict_slashes=True)
+    app.router.ALLOWED_METHODS = (
+        *app.router.ALLOWED_METHODS,
+        "MKCOL",
+        "MOVE",
+        "COPY",
+        "PROPFIND",
+    )
+    app.blueprint(fileserver_bp)
+    await fileserver.start()
+    yield app.asgi_client
+    await fileserver.stop()
+
+
+@pytest.mark.asyncio
+async def test_upload_rejected_when_disk_low(client):
+    with patch("cista.util.diskspace.shutil.disk_usage", side_effect=_low_disk_usage):
+        _, res = await client.put("/files/test.txt", data=b"hello world")
+    assert res.status_code == 507
+
+
+@pytest.mark.asyncio
+async def test_upload_rejected_on_enospc(client):
+    with patch(
+        "cista.fileio.os.write",
+        side_effect=OSError(errno.ENOSPC, "No space left on device"),
+    ):
+        _, res = await client.put("/files/test.txt", data=b"hello world")
+    assert res.status_code == 507

tests/test_files_auth.py

@@ -115,6 +115,12 @@ def setup_storage(tmp_path: Path):
         mode="rw",
         share_paths=["docs"],
     )
+    share_anon = config.Token(
+        key="share_anon_123",
+        kind="share",
+        mode="ro",
+        share_paths=["docs"],
+    )
     config.config = config.Config(
         path=tmp_path,
         listen=":0",
@@ -124,6 +130,7 @@ def setup_storage(tmp_path: Path):
             "test_token_123": token,
             "share_ro_123": share_ro,
             "share_rw_123": share_rw,
+            "share_anon_123": share_anon,
         },
     )
     watching.state.root = []
@@ -285,3 +292,20 @@ async def test_share_token_rw_allows_writes_in_scope_only(client):
         "/files/secret.txt", headers=_basic_auth("token", "share_rw_123")
     )
     assert res.status_code == 404
+
+
+@pytest.mark.asyncio
+async def test_anonymous_share_token_requires_public_mode(client):
+    config.config.public = True
+
+    _, res = await client.get(
+        "/files/docs/a.txt", headers=_basic_auth("token", "share_anon_123")
+    )
+    assert res.status_code == 200
+    assert res.body == b"A"
+
+    config.config.public = False
+    _, res = await client.get(
+        "/files/docs/a.txt", headers=_basic_auth("token", "share_anon_123")
+    )
+    assert res.status_code == 401

tests/test_tokens.py

@@ -1,3 +1,4 @@
+import os
 from pathlib import Path, PurePath
 from uuid import uuid4
 
@@ -23,7 +24,8 @@ def _persist_config():
 
 @pytest.fixture
 def setup_storage(tmp_path: Path):
-    config.init_confdir(tmp_path)
+    os.environ["CISTA_HOME"] = str(tmp_path)
+    config.init_confdir()
     user = config.User()
     auth.set_password(user, "secret")
     admin = config.User(privileged=True)
@@ -213,3 +215,18 @@ async def test_create_share_token(client):
     share_tokens = [t for t in res.json["tokens"] if t.get("kind") == "share"]
     assert len(share_tokens) == 1
     assert share_tokens[0]["mode"] == "ro"
+
+
+@pytest.mark.asyncio
+async def test_create_share_token_public_anonymous(client):
+    config.config = msgspec.structs.replace(config.config, public=True)
+
+    _, res = await client.post(
+        "/api/share-tokens",
+        json={"paths": ["hello.txt"], "mode": "ro", "name": "public-share"},
+    )
+    assert res.status_code == 200
+    data = res.json
+    assert data["kind"] == "share"
+    assert data["username"] == ""
+    assert data["sso_user_id"] == ""