diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index f8c5094c..9a2c5c8c 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -48,8 +48,20 @@ jobs:
       - name: Run mypy (type checking)
         run: uv run mypy codeframe/
 
-      # Note: Frontend linting disabled - web-ui is legacy during v2 CLI-first refactor
-      # Re-enable when web-ui package.json is restored
+      - name: Set up Node.js
+        uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
+        with:
+          node-version: ${{ env.NODE_VERSION }}
+          cache: 'npm'
+          cache-dependency-path: 'web-ui/package-lock.json'
+
+      - name: Install frontend dependencies
+        working-directory: web-ui
+        run: npm ci
+
+      - name: Run frontend lint (eslint)
+        working-directory: web-ui
+        run: npm run lint
 
   # ============================================
   # Static Analysis - Check for Hardcoded URLs
@@ -265,6 +277,12 @@ jobs:
         working-directory: web-ui
         run: npm ci
 
+      - name: Build (fail PR on TypeScript/build break)
+        working-directory: web-ui
+        env:
+          NEXT_TELEMETRY_DISABLED: 1
+        run: npm run build
+
       - name: Run Jest tests with coverage
         working-directory: web-ui
         run: npm run test:coverage
diff --git a/web-ui/__tests__/app/proof/req_id/page.test.tsx b/web-ui/__tests__/app/proof/req_id/page.test.tsx
index 3ada6399..928ec3e8 100644
--- a/web-ui/__tests__/app/proof/req_id/page.test.tsx
+++ b/web-ui/__tests__/app/proof/req_id/page.test.tsx
@@ -66,8 +66,6 @@ const waivedReq = {
   },
 };
 
-const mockEvidenceResponse = [];
-
 describe('ProofDetailPage', () => {
   beforeEach(() => {
     jest.clearAllMocks();
diff --git a/web-ui/src/__tests__/components/proof/ProofDetailPage.test.tsx b/web-ui/src/__tests__/components/proof/ProofDetailPage.test.tsx
index e44155f1..d7be1a34 100644
--- a/web-ui/src/__tests__/components/proof/ProofDetailPage.test.tsx
+++ b/web-ui/src/__tests__/components/proof/ProofDetailPage.test.tsx
@@ -3,7 +3,7 @@ import { render, screen, fireEvent } from '@testing-library/react';
 import useSWR from 'swr';
 import ProofDetailPage from '@/app/proof/[req_id]/page';
 import * as storage from '@/lib/workspace-storage';
-import type { ProofEvidence, ProofRequirement, ProofEvidenceSortCol, SortDir } from '@/types';
+import type { ProofEvidence, ProofRequirement } from '@/types';
 
 // ── Mocks ────────────────────────────────────────────────────────────────
 
diff --git a/web-ui/src/__tests__/components/tasks/GitHubIssueImportModal.test.tsx b/web-ui/src/__tests__/components/tasks/GitHubIssueImportModal.test.tsx
index 2d21d17f..cc909fa7 100644
--- a/web-ui/src/__tests__/components/tasks/GitHubIssueImportModal.test.tsx
+++ b/web-ui/src/__tests__/components/tasks/GitHubIssueImportModal.test.tsx
@@ -1,9 +1,8 @@
 import React from 'react';
-import { render, screen, fireEvent, waitFor, within } from '@testing-library/react';
+import { render, screen, fireEvent, waitFor } from '@testing-library/react';
 import useSWR from 'swr';
 
 import { GitHubIssueImportModal } from '@/components/tasks/GitHubIssueImportModal';
-import { integrationsApi } from '@/lib/api';
 import type { GitHubIssue, GitHubIssuesResponse } from '@/types';
 
 jest.mock('swr');
diff --git a/web-ui/src/components/proof/CaptureGlitchModal.tsx b/web-ui/src/components/proof/CaptureGlitchModal.tsx
index 7769499a..00de7f62 100644
--- a/web-ui/src/components/proof/CaptureGlitchModal.tsx
+++ b/web-ui/src/components/proof/CaptureGlitchModal.tsx
@@ -4,7 +4,6 @@ import { useState, useEffect } from 'react';
 import { Cancel01Icon } from '@hugeicons/react';
 import * as DialogPrimitive from '@radix-ui/react-dialog';
 import { Button } from '@/components/ui/button';
-import { Input } from '@/components/ui/input';
 import { Textarea } from '@/components/ui/textarea';
 import { Checkbox } from '@/components/ui/checkbox';
 import {