feat: implement full context-scoped AI chat UI in AIChatPanel

- Added AIChatPanel component with context header, user and AI message handling.
- Integrated streaming responses via IPC and error handling for chat mutations.
- Enhanced user experience with input handling and auto-scrolling features.
- Updated AppShell to derive AI chat context from the current route.
- Introduced ScrollArea component for better scrolling behavior in various dialogs.
- Added support for Tailwind typography and improved global styles.
- Updated project and task dialogs to utilize ScrollArea for better UX.

package.json

@@ -54,6 +54,7 @@
     "@langchain/openai": "^1.2.9",
     "@milkdown/crepe": "^7.18.0",
     "@milkdown/kit": "^7.18.0",
+    "@tailwindcss/typography": "^0.5.19",
     "@tailwindcss/vite": "^4.2.0",
     "@tanstack/react-query": "^5.90.21",
     "@tanstack/react-router": "^1.161.1",
@@ -74,6 +75,8 @@
     "react": "^19.2.4",
     "react-day-picker": "^9.13.2",
     "react-dom": "^19.2.4",
+    "react-markdown": "^10.1.0",
+    "remark-gfm": "^4.0.1",
     "tailwind-merge": "^3.5.0",
     "tw-animate-css": "^1.4.0",
     "zod": "^4.3.6"