diff --git a/.github/workflows/backend-ci.yml b/.github/workflows/backend-ci.yml
index 5d306a1..eac3c13 100644
--- a/.github/workflows/backend-ci.yml
+++ b/.github/workflows/backend-ci.yml
@@ -3,7 +3,15 @@ name: Backend CI
 on:
   push:
     branches: [main]
+    paths:
+      - 'backend/**'
+      - 'pyproject.toml'
+      - '.github/workflows/backend-ci.yml'
   pull_request:
+    paths:
+      - 'backend/**'
+      - 'pyproject.toml'
+      - '.github/workflows/backend-ci.yml'
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
@@ -21,9 +29,11 @@ jobs:
         uses: actions/setup-python@v5
         with:
           python-version: '3.13'
+          cache: 'pip'
+          cache-dependency-path: backend/requirements-dev.txt
 
       - name: Install Ruff
-        run: pip install ruff
+        run: pip install ruff==0.6.9
 
       - name: Run Ruff
         run: ruff check backend
@@ -50,7 +60,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip setuptools wheel
-          pip install -r requirements.txt -r requirements-dev.txt pytest pytest-asyncio
+          pip install -r requirements-dev.txt
 
       - name: Run tests
         run: python -m pytest
diff --git a/.github/workflows/frontend-ci.yml b/.github/workflows/frontend-ci.yml
index 1b0426c..ed57265 100644
--- a/.github/workflows/frontend-ci.yml
+++ b/.github/workflows/frontend-ci.yml
@@ -3,7 +3,13 @@ name: Frontend CI
 on:
   push:
     branches: [main]
+    paths:
+      - 'frontend/**'
+      - '.github/workflows/frontend-ci.yml'
   pull_request:
+    paths:
+      - 'frontend/**'
+      - '.github/workflows/frontend-ci.yml'
 
 defaults:
   run:
@@ -14,8 +20,8 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
-  lint:
-    name: Lint
+  quality:
+    name: Lint, Format & Type Check
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
@@ -39,53 +45,9 @@ jobs:
       - name: Run ESLint
         run: pnpm run lint
 
-  format:
-    name: Format Check
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout code
-        uses: actions/checkout@v4
-
-      - name: Setup pnpm
-        uses: pnpm/action-setup@v4
-        with:
-          version: 10
-
-      - name: Setup Node.js
-        uses: actions/setup-node@v4
-        with:
-          node-version: '25'
-          cache: 'pnpm'
-          cache-dependency-path: frontend/pnpm-lock.yaml
-
-      - name: Install dependencies
-        run: pnpm install --frozen-lockfile
-
       - name: Run Prettier
         run: pnpm run format:check
 
-  typecheck:
-    name: Type Check
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout code
-        uses: actions/checkout@v4
-
-      - name: Setup pnpm
-        uses: pnpm/action-setup@v4
-        with:
-          version: 10
-
-      - name: Setup Node.js
-        uses: actions/setup-node@v4
-        with:
-          node-version: '25'
-          cache: 'pnpm'
-          cache-dependency-path: frontend/pnpm-lock.yaml
-
-      - name: Install dependencies
-        run: pnpm install --frozen-lockfile
-
       - name: Run type check
         run: pnpm run check
 
@@ -111,5 +73,8 @@ jobs:
       - name: Install dependencies
         run: pnpm install --frozen-lockfile
 
-      - name: Run tests (server project)
-        run: pnpm exec vitest run --project server
+      - name: Install Playwright browsers
+        run: pnpm exec playwright install chromium --with-deps
+
+      - name: Run tests
+        run: pnpm exec vitest run
diff --git a/Dockerfile b/Dockerfile
index 59260ba..52fe058 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
 ##
 # Stage 1 — Build frontend
 ##
-FROM node:22.16-alpine AS frontend-build
+FROM node:25-alpine AS frontend-build
 
 WORKDIR /app/frontend
 
diff --git a/backend/requirements-dev.txt b/backend/requirements-dev.txt
index a99f5f6..8f8ee06 100644
--- a/backend/requirements-dev.txt
+++ b/backend/requirements-dev.txt
@@ -1,5 +1,7 @@
 -r requirements.txt
 mypy==1.18.2
+pytest==8.3.5
+pytest-asyncio==0.25.3
 ruff==0.6.9
 types-PyYAML==6.0.12.20250915
 watchfiles==1.1.0