v0.3.1 — view-panel tabs, tray + notifications, server-activity, media preview, dockable locks

- Tabbed view panel: File Viewer / File Tree / File Locks, header hidden at one tab, re-openable from Window, state persisted
- Right-click Workspace/Working-folder zones -> Show in File Tree (focuses the right side)
- Commit weight shown in History (p4 sizes -s //...@=CH)
- Rich code editor (highlighted underlay + gutter) and clean spec-editor surfaces (no more grey notepad)
- System tray (close-to-tray, tray menu Quit) + native OS notifications for teammate submits, even when hidden
- 'You're behind the server' banner + native notification (p4 sync -n), rechecked only when the server advances
- Audio & video preview with playback (media-src blob CSP); File Locks dockable into the view panel
- Backend: depot_ls/fs_ls, p4_change_sizes, p4_behind; tauri-plugin-notification + tray-icon

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src-tauri/capabilities/default.json

@@ -11,8 +11,13 @@
     "core:window:allow-minimize",
     "core:window:allow-toggle-maximize",
     "core:window:allow-close",
+    "core:window:allow-show",
+    "core:window:allow-hide",
+    "core:window:allow-set-focus",
+    "core:window:allow-unminimize",
     "dialog:default",
     "updater:default",
-    "process:default"
+    "process:default",
+    "notification:default"
   ]
 }