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/auth/space/callback/page.tsx

@@ -1,7 +1,5 @@
-'use client';
-
 import { useEffect, useState, useCallback, Suspense } from 'react';
-import { useRouter, useSearchParams } from 'next/navigation';
+import { useNavigate, useSearchParams } from 'react-router-dom';
 import { httpClient } from '@/app/infra/http/HttpClient';
 import { toast } from 'sonner';
 import { useTranslation } from 'react-i18next';
@@ -23,8 +21,8 @@ import { LoadingSpinner } from '@/components/ui/loading-spinner';
 import langbotIcon from '@/app/assets/langbot-logo.webp';
 
 function SpaceOAuthCallbackContent() {
-  const router = useRouter();
-  const searchParams = useSearchParams();
+  const navigate = useNavigate();
+  const [searchParams] = useSearchParams();
   const { t } = useTranslation();
 
   const [status, setStatus] = useState<
@@ -51,7 +49,7 @@ function SpaceOAuthCallbackContent() {
         const wizardState = localStorage.getItem('langbot_wizard_state');
         const redirectTo = wizardState ? '/wizard' : '/home';
         setTimeout(() => {
-          router.push(redirectTo);
+          navigate(redirectTo);
         }, 1000);
       } catch (err) {
         setStatus('error');
@@ -64,7 +62,7 @@ function SpaceOAuthCallbackContent() {
         }
       }
     },
-    [router, t],
+    [navigate, t],
   );
 
   const [bindState, setBindState] = useState<string | null>(null);
@@ -81,7 +79,7 @@ function SpaceOAuthCallbackContent() {
         setStatus('success');
         toast.success(t('account.bindSpaceSuccess'));
         setTimeout(() => {
-          router.push('/home');
+          navigate('/home');
         }, 1000);
       } catch (err) {
         setStatus('error');
@@ -96,7 +94,7 @@ function SpaceOAuthCallbackContent() {
         setIsProcessing(false);
       }
     },
-    [router, t],
+    [navigate, t],
   );
 
   useEffect(() => {
@@ -146,7 +144,7 @@ function SpaceOAuthCallbackContent() {
   };
 
   const handleCancelBind = () => {
-    router.push('/home');
+    navigate('/home');
   };
 
   return (
@@ -154,7 +152,7 @@ function SpaceOAuthCallbackContent() {
       <Card className="w-[400px] shadow-lg dark:shadow-white/10">
         <CardHeader className="text-center">
           <img
-            src={langbotIcon.src}
+            src={langbotIcon}
             alt="LangBot"
             className="w-16 h-16 mb-4 mx-auto"
           />
@@ -217,7 +215,7 @@ function SpaceOAuthCallbackContent() {
             <>
               <AlertCircle className="h-12 w-12 text-red-500" />
               <Button
-                onClick={() => router.push(isBindMode ? '/home' : '/login')}
+                onClick={() => navigate(isBindMode ? '/home' : '/login')}
                 className="w-full mt-4"
               >
                 {isBindMode ? t('common.backToHome') : t('common.backToLogin')}