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/wizard/page.tsx

@@ -1,7 +1,5 @@
-'use client';
-
 import { useCallback, useEffect, useMemo, useRef, useState } from 'react';
-import { useRouter } from 'next/navigation';
+import { useNavigate } from 'react-router-dom';
 import { useTranslation } from 'react-i18next';
 import { UUID } from 'uuidjs';
 import { toast } from 'sonner';
@@ -81,7 +79,7 @@ const TOTAL_STEPS = 4;
 
 export default function WizardPage() {
   const { t } = useTranslation();
-  const router = useRouter();
+  const navigate = useNavigate();
 
   // ---- Wizard state ----
   const [currentStep, setCurrentStep] = useState(0);
@@ -519,8 +517,8 @@ export default function WizardPage() {
     }
     setIsSkipping(false);
     setShowSkipConfirm(false);
-    router.push('/home');
-  }, [router, t]);
+    navigate('/home');
+  }, [navigate, t]);
 
   // ---- Render ----
 
@@ -1169,7 +1167,7 @@ function StepAIEngine({
 
 function StepDone() {
   const { t } = useTranslation();
-  const router = useRouter();
+  const navigate = useNavigate();
 
   const [particles] = useState(() =>
     Array.from({ length: 30 }, (_, i) => ({
@@ -1213,8 +1211,8 @@ function StepDone() {
       return;
     }
     setIsCompleting(false);
-    router.push('/home/bots');
-  }, [router, t]);
+    navigate('/home/bots');
+  }, [navigate, t]);
 
   return (
     <div className="relative flex flex-col items-center justify-center h-full min-h-[400px]">
@@ -1244,7 +1242,7 @@ function StepDone() {
         {t('wizard.done.backToWorkbench')}
       </Button>
 
-      <style jsx>{`
+      <style>{`
         @keyframes wizardConfetti {
           0% {
             transform: translateY(100vh) rotate(0deg);