feat(22-01): add UIStore modal states, AddToCollectionModal, and sonner toasts

- Extend UIStore with addToCollectionModal, addToThreadModal, catalogSessionThreadId
- Create AddToCollectionModal with category dropdown, notes, purchase price
- Install sonner and add Toaster + AddToCollectionModal to root layout
- closeCatalogSearch now resets catalogSessionThreadId

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

bun.lock

@@ -20,6 +20,7 @@
         "react": "^19.2.4",
         "react-dom": "^19.2.4",
         "recharts": "^3.8.0",
+        "sonner": "^2.0.7",
         "tailwindcss": "^4.2.1",
         "zod": "^4.3.6",
         "zustand": "^5.0.11",
@@ -964,6 +965,8 @@
 
     "simple-get": ["simple-get@4.0.1", "", { "dependencies": { "decompress-response": "^6.0.0", "once": "^1.3.1", "simple-concat": "^1.0.0" } }, "sha512-brv7p5WgH0jmQJr1ZDDfKDOSeWWg+OVypG99A/5vYGPqJ6pxiaHLy8nxtFjBA7oMa01ebA9gfh1uMCFqOuXxvA=="],
 
+    "sonner": ["sonner@2.0.7", "", { "peerDependencies": { "react": "^18.0.0 || ^19.0.0 || ^19.0.0-rc", "react-dom": "^18.0.0 || ^19.0.0 || ^19.0.0-rc" } }, "sha512-W6ZN4p58k8aDKA4XPcx2hpIQXBRAgyiWVkYhT7CvK6D3iAu7xjvVyhQHg2/iaKJZ1XVJ4r7XuwGL+WGEK37i9w=="],
+
     "source-map": ["source-map@0.7.6", "", {}, "sha512-i5uvt8C3ikiWeNZSVZNWcfZPItFQOsYTUAOkcUPGd8DqDy1uOUikjt5dG+uRlwyvR108Fb9DOd4GvXfT0N2/uQ=="],
 
     "source-map-js": ["source-map-js@1.2.1", "", {}, "sha512-UXWMKhLOwVKb728IUtQPXxfYU+usdybtUrK/8uGE8CQMvrhOpwvzDBwj0QhSL7MQc7vIsISBG8VQ8+IDQxpfQA=="],