fix: resolve UI layout issues and dropdown popover z-index

- Upgrade HeroUI v2 to v3 with React Aria Components
- Fix textarea not filling available space via CSS override for .textfield flex
- Fix dropdown popovers being obscured by elements below using overflow-clip
  instead of overflow-hidden (avoids stacking context interference)
- Add min-w-0 throughout flex/grid chain to prevent content overflow on
  medium-width viewports
- Add visible field borders via CSS custom properties
- Add touch-action: manipulation for mobile responsiveness
- Add dev server launch config for Claude Preview

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

Author: AuroraDysis

.claude/launch.json

@@ -0,0 +1,11 @@
+{
+  "version": "0.0.1",
+  "configurations": [
+    {
+      "name": "dev",
+      "runtimeExecutable": "pnpm",
+      "runtimeArgs": ["run", "dev"],
+      "port": 8080
+    }
+  ]
+}

next.config.ts

@@ -2,6 +2,9 @@ import type { NextConfig } from "next";
 
 const nextConfig: NextConfig = {
   output: 'standalone',
+  experimental: {
+    optimizePackageImports: ['@heroui/react'],
+  },
 };
 
 export default nextConfig;

package.json

@@ -11,11 +11,11 @@
   },
   "dependencies": {
     "@ai-sdk/openai-compatible": "^2.0.37",
-    "@heroui/react": "2.8.9",
+    "@heroui/react": "3.0.1",
+    "@heroui/styles": "3.0.1",
     "@tailwindcss/postcss": "^4.2.2",
     "ai": "^6.0.134",
     "diff": "^8.0.3",
-    "framer-motion": "^12.38.0",
     "next": "^16.2.1",
     "next-themes": "^0.4.6",
     "react": "19.2.4",
@@ -48,7 +48,6 @@
   "packageManager": "pnpm@10.30.3",
   "pnpm": {
     "onlyBuiltDependencies": [
-      "@heroui/shared-utils",
       "@tailwindcss/oxide",
       "sharp",
       "unrs-resolver"