feat: add visual todo list panel

- Add TodoPanel component to display TodoWrite tool calls
- Create todos Svelte store to track todo state
- Emit todo-update Tauri event when TodoWrite is called
- Add todo button to status bar (next to session history)
- Display todos with status icons, progress bar, and completion count
- Real-time updates as I work through tasks

Closes #132

pnpm-lock.yaml

@@ -119,6 +119,9 @@ importers:
       highlight.js:
         specifier: ^11.11.1
         version: 11.11.1
+      lucide-svelte:
+        specifier: ^0.563.0
+        version: 0.563.0(svelte@5.46.3)
       marked:
         specifier: ^17.0.1
         version: 17.0.1
@@ -1668,6 +1671,11 @@ packages:
     resolution: {integrity: sha512-B5Y16Jr9LB9dHVkh6ZevG+vAbOsNOYCX+sXvFWFu7B3Iz5mijW3zdbMyhsh8ANd2mSWBYdJgnqi+mL7/LrOPYg==}
     engines: {node: 20 || >=22}
 
+  lucide-svelte@0.563.0:
+    resolution: {integrity: sha512-pjZKw7TpQcamfQrx7YdbOHgmrcNeKiGGMD0tKZQaVktwSsbqw28CsKc2Q97ttwjytiCWkJyOa8ij2Q+Og0nPfQ==}
+    peerDependencies:
+      svelte: ^3 || ^4 || ^5.0.0-next.42
+
   lz-string@1.5.0:
     resolution: {integrity: sha512-h5bgJWpxJNswbU7qCrV0tIKQCaS3blPDrqKWx+QxzuzL1zGUzij9XCWLrSLsJPu5t+eWA/ycetzYAO5IOMcWAQ==}
     hasBin: true
@@ -3650,6 +3658,10 @@ snapshots:
 
   lru-cache@11.2.4: {}
 
+  lucide-svelte@0.563.0(svelte@5.46.3):
+    dependencies:
+      svelte: 5.46.3
+
   lz-string@1.5.0: {}
 
   magic-string@0.30.21: