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/tauri.conf.json

@@ -2,7 +2,7 @@
   "$schema": "https://schema.tauri.app/config/2",
   "productName": "Exbyte Depot",
   "mainBinaryName": "Exbyte Depot",
-  "version": "0.3.0",
+  "version": "0.3.1",
   "identifier": "com.bonchellon.exbyte-depot",
   "build": {
     "beforeDevCommand": "npm run dev",
@@ -24,8 +24,8 @@
       }
     ],
     "security": {
-      "csp": "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; img-src 'self' data: blob: asset: http://asset.localhost; font-src 'self' data:; connect-src 'self' ipc: http://ipc.localhost https://openrouter.ai; worker-src 'self' blob:; object-src 'none'; base-uri 'self'",
-      "devCsp": "default-src 'self'; script-src 'self' 'unsafe-inline'; style-src 'self' 'unsafe-inline'; img-src 'self' data: blob: asset: http://asset.localhost; font-src 'self' data:; connect-src 'self' ipc: http://ipc.localhost ws://localhost:1420 http://localhost:1420 https://openrouter.ai; worker-src 'self' blob:; object-src 'none'; base-uri 'self'"
+      "csp": "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; img-src 'self' data: blob: asset: http://asset.localhost; media-src 'self' blob:; font-src 'self' data:; connect-src 'self' ipc: http://ipc.localhost https://openrouter.ai; worker-src 'self' blob:; object-src 'none'; base-uri 'self'",
+      "devCsp": "default-src 'self'; script-src 'self' 'unsafe-inline'; style-src 'self' 'unsafe-inline'; img-src 'self' data: blob: asset: http://asset.localhost; media-src 'self' blob:; font-src 'self' data:; connect-src 'self' ipc: http://ipc.localhost ws://localhost:1420 http://localhost:1420 https://openrouter.ai; worker-src 'self' blob:; object-src 'none'; base-uri 'self'"
     }
   },
   "bundle": {