chore: update fonts, Tauri config, and reduced-motion support

- Switch font deps from Sora/Manrope/IBM Plex Mono to Fraunces/Inter/Space Mono (Cold Open theme)
- Add Tauri window permissions for custom titlebar controls
- Disable native decorations and drag-drop in Tauri config
- Add prefers-reduced-motion media query for WCAG compliance

src-tauri/tauri.conf.json

@@ -16,7 +16,9 @@
         "width": 1320,
         "height": 860,
         "minWidth": 640,
-        "minHeight": 480
+        "minHeight": 480,
+        "decorations": false,
+        "dragDropEnabled": false
       }
     ],
     "security": {