refactor(web): migrate from Next.js to Vite + React Router (#2102)

* refactor(web): migrate from Next.js to Vite + React Router

* fix: update build pipelines for Vite migration (out → dist)

- Dockerfile: npm run build → npx vite build, web/out → web/dist
- pyproject.toml: package-data web/out/** → web/dist/**
- paths.py: support both web/dist (Vite) and web/out (legacy) with fallback

* fix: remove .next from git tracking, add to .gitignore

1334 cached files from web/.next/ were accidentally committed.
Added .next/ to both root and web/.gitignore.

* fix: update build process to use Vite and correct output directory

* fix: update pnpm-lock.yaml and eslint config for Vite migration

* style: fix prettier formatting issues

* fix: add eslint-plugin-react-hooks for Vite migration

* fix: remove undefined eslint rule reference, downgrade react-hooks plugin to v5

* fix(web): clean up remaining Next.js artifacts in Vite migration

- Add vite-env.d.ts for import.meta.env and asset type declarations
- Remove dead layout.tsx (providers already in main.tsx)
- Fix useSearchParams destructuring to [searchParams] tuple (11 locations)
- Replace process.env.NEXT_PUBLIC_* with import.meta.env.VITE_*
- Fix langbotIcon.src to langbotIcon (Vite returns URL string)
- Fix Link href to Link to for react-router-dom
- Fix navigate({ scroll: false }) to { preventScrollReset: true }
- Fix [router] dependency arrays to [navigate]
- Remove Next.js plugin from tsconfig, set rsc: false in components.json
- Replace next lint with eslint in lint-staged

* feat: add tools API endpoint and tools-selector form type

Backend:
- Add GET /api/v1/tools — list all available tools (plugin + MCP)
- Add GET /api/v1/tools/<tool_name> — get specific tool details

Frontend:
- Add TOOLS_SELECTOR form type for plugin config forms
- Multi-select dialog with tool name and description
- Add PluginTool entity type and API client methods

* Revert "feat: add tools API endpoint and tools-selector form type"

This reverts commit 3c637fc563.

web/src/app/home/components/api-integration-dialog/ApiIntegrationDialog.tsx

@@ -1,11 +1,9 @@
-'use client';
-
 import * as React from 'react';
 import { useState, useEffect } from 'react';
 import { useTranslation } from 'react-i18next';
 import { toast } from 'sonner';
 import { Copy, Check, Trash2, Plus } from 'lucide-react';
-import { useRouter, usePathname, useSearchParams } from 'next/navigation';
+import { useNavigate, useLocation, useSearchParams } from 'react-router-dom';
 import {
   Dialog,
   DialogContent,
@@ -67,9 +65,10 @@ export default function ApiIntegrationDialog({
   onOpenChange,
 }: ApiIntegrationDialogProps) {
   const { t } = useTranslation();
-  const router = useRouter();
-  const pathname = usePathname();
-  const searchParams = useSearchParams();
+  const navigate = useNavigate();
+  const location = useLocation();
+  const pathname = location.pathname;
+  const [searchParams] = useSearchParams();
   const [activeTab, setActiveTab] = useState('apikeys');
   const [apiKeys, setApiKeys] = useState<ApiKey[]>([]);
   const [webhooks, setWebhooks] = useState<Webhook[]>([]);
@@ -94,7 +93,9 @@ export default function ApiIntegrationDialog({
     if (open) {
       const params = new URLSearchParams(searchParams.toString());
       params.set('action', 'showApiIntegrationSettings');
-      router.replace(`${pathname}?${params.toString()}`, { scroll: false });
+      navigate(`${pathname}?${params.toString()}`, {
+        preventScrollReset: true,
+      });
     }
   }, [open]);
 
@@ -108,7 +109,7 @@ export default function ApiIntegrationDialog({
       const newUrl = params.toString()
         ? `${pathname}?${params.toString()}`
         : pathname;
-      router.replace(newUrl, { scroll: false });
+      navigate(newUrl, { preventScrollReset: true });
     }
     onOpenChange(newOpen);
   };