fix: change users.id and FK columns from uuid to text for Better-Auth compatibility

Better-Auth generates nanoid-style text IDs (e.g. pGud2ln2WAFHC0KYjBVKR4Rc7mM8OcTI),
but the users table used PostgreSQL uuid type, causing registration failures:
  ERROR: invalid input syntax for type uuid: "pGud2ln2WAFHC0KYjBVKR4Rc7mM8OcTI"

Changes:
- User.id: removed UUIDPrimaryKeyMixin, use explicit text PK
- UserStoreAccount.user_id: Mapped[uuid.UUID] -> Mapped[str]
- Purchase.user_id: Mapped[uuid.UUID] -> Mapped[str]
- UserResponse schema: id field from UUID -> str
- New Alembic migration 004_fix_user_id_text: drops FKs, alters column
  types, re-adds FKs (using id::text cast)

Co-Authored-By: Paperclip <noreply@paperclip.ing>

.github/workflows/ci.yml

@@ -19,6 +19,7 @@ env:
   IMAGE_NAME: cartsnitch/cartsnitch
   AUTH_IMAGE_NAME: cartsnitch/auth
   RECEIPTWITNESS_IMAGE_NAME: cartsnitch/receiptwitness
+  API_IMAGE_NAME: cartsnitch/api
 
 jobs:
   lint:
@@ -47,9 +48,59 @@ jobs:
       - name: Run tests
         run: npx vitest run
 
+  audit:
+    runs-on: runners-cartsnitch
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: "20"
+          cache: npm
+      - run: npm ci
+      - name: Check for vulnerabilities
+        run: npm audit --audit-level=high
+
+  e2e:
+    runs-on: runners-cartsnitch
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: "20"
+          cache: npm
+      - run: npm ci
+      - run: npx playwright install --with-deps chromium
+      - run: npx playwright test
+
+  lighthouse:
+    runs-on: runners-cartsnitch
+    needs: [test]
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: "20"
+          cache: npm
+      - run: npm ci
+      - run: npm run build
+      - name: Install Chromium for Lighthouse
+        run: |
+          npm install -g playwright
+          npx playwright install --with-deps chromium
+      - name: Start preview server
+        run: |
+          npm run preview &
+          npx wait-on http://localhost:4173/ --timeout 30000
+      - name: Run Lighthouse CI
+        run: |
+          CHROME_PATH=$(find /home/runner/.cache/ms-playwright -name chrome -type f 2>/dev/null | head -1)
+          npm install -g @lhci/cli
+          LHCI_CHROME_PATH="$CHROME_PATH" lhci autorun
+
   build-and-push:
     runs-on: runners-cartsnitch
-    needs: [lint, test]
+    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+    needs: [lint, test, e2e]
     outputs:
       calver_tag: ${{ steps.calver.outputs.version }}
     steps:
@@ -74,6 +125,13 @@ jobs:
           echo "version=$VERSION" >> "$GITHUB_OUTPUT"
           echo "CalVer tag: $VERSION"
 
+      - name: Log in to Docker Hub
+        if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
       - name: Log in to GHCR
         if: github.event_name == 'push' && github.ref == 'refs/heads/main'
         uses: docker/login-action@v3
@@ -111,7 +169,8 @@ jobs:
 
   build-and-push-auth:
     runs-on: runners-cartsnitch
-    needs: [lint, test]
+    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+    needs: [lint, test, e2e]
     outputs:
       calver_tag: ${{ steps.calver.outputs.version }}
     steps:
@@ -135,6 +194,13 @@ jobs:
           fi
           echo "version=$VERSION" >> "$GITHUB_OUTPUT"
 
+      - name: Log in to Docker Hub
+        if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
       - name: Log in to GHCR
         if: github.event_name == 'push' && github.ref == 'refs/heads/main'
         uses: docker/login-action@v3
@@ -164,6 +230,7 @@ jobs:
 
   build-and-push-receiptwitness:
     runs-on: runners-cartsnitch
+    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
     needs: [lint, test]
     outputs:
       calver_tag: ${{ steps.calver.outputs.version }}
@@ -183,6 +250,13 @@ jobs:
           else BUILD_NUM=$(echo "$EXISTING" | sed "s/v${DATE_TAG}\.//"); VERSION="${DATE_TAG}.$((BUILD_NUM + 1))"; fi
           echo "version=$VERSION" >> "$GITHUB_OUTPUT"
 
+      - name: Log in to Docker Hub
+        if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
       - name: Log in to GHCR
         if: github.event_name == 'push' && github.ref == 'refs/heads/main'
         uses: docker/login-action@v3
@@ -210,10 +284,66 @@ jobs:
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
 
+  build-and-push-api:
+    runs-on: runners-cartsnitch
+    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+    needs: [lint, test]
+    outputs:
+      calver_tag: ${{ steps.calver.outputs.version }}
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Generate CalVer tag
+        id: calver
+        if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+        run: |
+          DATE_TAG=$(date -u +%Y.%m.%d)
+          EXISTING=$(git tag -l "v${DATE_TAG}*" | sort -V | tail -1)
+          if [ -z "$EXISTING" ]; then VERSION="$DATE_TAG"
+          elif [ "$EXISTING" = "v${DATE_TAG}" ]; then VERSION="${DATE_TAG}.2"
+          else BUILD_NUM=$(echo "$EXISTING" | sed "s/v${DATE_TAG}\.//"); VERSION="${DATE_TAG}.$((BUILD_NUM + 1))"; fi
+          echo "version=$VERSION" >> "$GITHUB_OUTPUT"
+
+      - name: Log in to Docker Hub
+        if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Log in to GHCR
+        if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata (API)
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.API_IMAGE_NAME }}
+          tags: |
+            type=sha,prefix=sha-
+            type=raw,value=${{ steps.calver.outputs.version }},enable=${{ github.ref == 'refs/heads/main' }}
+            type=raw,value=latest,enable=${{ github.ref == 'refs/heads/main' }}
+
+      - name: Build and push API Docker image
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          file: ./api/Dockerfile
+          push: ${{ github.event_name == 'push' && github.ref == 'refs/heads/main' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+
   deploy-dev:
     runs-on: runners-cartsnitch
-    needs: [build-and-push, build-and-push-auth, build-and-push-receiptwitness]
+    needs: [build-and-push, build-and-push-auth, build-and-push-receiptwitness, build-and-push-api]
-    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+    if: always() && !cancelled() && github.event_name == 'push' && github.ref == 'refs/heads/main'
     steps:
       - name: Generate GitHub App token
         id: app-token
@@ -238,18 +368,35 @@ jobs:
       - name: Install kustomize
         uses: imranismail/setup-kustomize@v2
 
-      - name: Update dev overlay image tags
+      - name: Update frontend image tag
+        if: needs.build-and-push.result == 'success'
         run: |
           cd infra/apps/overlays/dev
           kustomize edit set image ghcr.io/cartsnitch/cartsnitch:${{ needs.build-and-push.outputs.calver_tag }}
+
+      - name: Update auth image tag
+        if: needs.build-and-push-auth.result == 'success'
+        run: |
+          cd infra/apps/overlays/dev
           kustomize edit set image ghcr.io/cartsnitch/auth:${{ needs.build-and-push-auth.outputs.calver_tag }}
+
+      - name: Update receiptwitness image tag
+        if: needs.build-and-push-receiptwitness.result == 'success'
+        run: |
+          cd infra/apps/overlays/dev
           kustomize edit set image ghcr.io/cartsnitch/receiptwitness:${{ needs.build-and-push-receiptwitness.outputs.calver_tag }}
 
+      - name: Update api image tag
+        if: needs.build-and-push-api.result == 'success'
+        run: |
+          cd infra/apps/overlays/dev
+          kustomize edit set image ghcr.io/cartsnitch/api:${{ needs.build-and-push-api.outputs.calver_tag }}
+
       - name: Commit and push to infra
         run: |
           cd infra
           git config user.name "cartsnitch-ci[bot]"
           git config user.email "cartsnitch-ci[bot]@users.noreply.github.com"
           git add apps/overlays/dev/kustomization.yaml
-          git commit -m "ci(dev): update cartsnitch, auth, and receiptwitness images"
+          git commit -m "ci(dev): update cartsnitch, auth, receiptwitness, and api images"
           git push origin main

api/Dockerfile

@@ -1,3 +1,5 @@
+# Stage 1: Build dependencies
+# Build context is the repo root.  Paths below are relative to the root.
 FROM python:3.12-slim AS build
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
@@ -6,18 +8,21 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     && rm -rf /var/lib/apt/lists/*
 
 WORKDIR /app
-COPY pyproject.toml ./
+COPY api/pyproject.toml ./
-COPY src/ ./src/
+COPY api/src/ ./src/
 RUN pip install --no-cache-dir --prefix=/install .
 
+# Stage 2: Production image
 FROM python:3.12-slim AS prod
 
+RUN apt-get update && apt-get install -y --no-install-recommends libpq5 && rm -rf /var/lib/apt/lists/*
+
 WORKDIR /app
 RUN adduser --system --group --uid 1000 app
 COPY --from=build /install /usr/local
-COPY src/ ./src/
+COPY api/src/ ./src/
-COPY alembic.ini ./
+COPY api/alembic.ini ./
-COPY alembic/ ./alembic/
+COPY api/alembic/ ./alembic/
 
 USER 1000
 EXPOSE 8000

api/alembic/versions/004_fix_user_id_text.py

@@ -0,0 +1,122 @@
+"""Fix users.id UUID->text type mismatch for Better-Auth compatibility.
+
+Better-Auth generates nanoid-style text IDs (e.g. pGud2ln2WAFHC0KYjBVKR4Rc7mM8OcTI),
+but the users table was using PostgreSQL uuid type. When Better-Auth tries to INSERT
+a new user, Postgres throws:
+  ERROR: invalid input syntax for type uuid: "pGud2ln2WAFHC0KYjBVKR4Rc7mM8OcTI"
+
+The sessions, accounts, and verifications tables already use text IDs — only users,
+user_store_accounts.user_id, and purchases.user_id needed fixing.
+
+Revision ID: 004_fix_user_id_text
+Revises: 003_make_users_hashed_password_nullable
+Create Date: 2026-03-31
+"""
+
+import sqlalchemy as sa
+from sqlalchemy import text
+
+from alembic import op
+
+revision = "004_fix_user_id_text"
+down_revision = "003_make_users_hashed_password_nullable"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    # Step 1: Drop existing FK constraints
+    op.execute(text("ALTER TABLE user_store_accounts DROP CONSTRAINT IF EXISTS user_store_accounts_user_id_fkey"))
+    op.execute(text("ALTER TABLE purchases DROP CONSTRAINT IF EXISTS purchases_user_id_fkey"))
+
+    # Step 2: Alter users.id from uuid to text
+    op.alter_column(
+        "users",
+        "id",
+        type_=sa.Text(),
+        existing_type=sa.UUID(),
+        postgresql_using="id::text",
+    )
+
+    # Step 3: Alter user_store_accounts.user_id from uuid to text
+    op.alter_column(
+        "user_store_accounts",
+        "user_id",
+        type_=sa.Text(),
+        existing_type=sa.UUID(),
+        postgresql_using="user_id::text",
+    )
+
+    # Step 4: Alter purchases.user_id from uuid to text
+    op.alter_column(
+        "purchases",
+        "user_id",
+        type_=sa.Text(),
+        existing_type=sa.UUID(),
+        postgresql_using="user_id::text",
+    )
+
+    # Step 5: Re-add FK constraints
+    op.execute(
+        text(
+            "ALTER TABLE user_store_accounts "
+            "ADD CONSTRAINT user_store_accounts_user_id_fkey "
+            "FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE"
+        )
+    )
+    op.execute(
+        text(
+            "ALTER TABLE purchases "
+            "ADD CONSTRAINT purchases_user_id_fkey "
+            "FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE"
+        )
+    )
+
+
+def downgrade() -> None:
+    # Drop FK constraints
+    op.execute(text("ALTER TABLE user_store_accounts DROP CONSTRAINT IF EXISTS user_store_accounts_user_id_fkey"))
+    op.execute(text("ALTER TABLE purchases DROP CONSTRAINT IF EXISTS purchases_user_id_fkey"))
+
+    # Revert users.id from text to uuid
+    op.alter_column(
+        "users",
+        "id",
+        type_=sa.UUID(),
+        existing_type=sa.Text(),
+        postgresql_using="id::uuid",
+    )
+
+    # Revert user_store_accounts.user_id from text to uuid
+    op.alter_column(
+        "user_store_accounts",
+        "user_id",
+        type_=sa.UUID(),
+        existing_type=sa.Text(),
+        postgresql_using="user_id::uuid",
+    )
+
+    # Revert purchases.user_id from text to uuid
+    op.alter_column(
+        "purchases",
+        "user_id",
+        type_=sa.UUID(),
+        existing_type=sa.Text(),
+        postgresql_using="user_id::uuid",
+    )
+
+    # Re-add FK constraints (PostgreSQL will auto-name them)
+    op.execute(
+        text(
+            "ALTER TABLE user_store_accounts "
+            "ADD CONSTRAINT user_store_accounts_user_id_fkey "
+            "FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE"
+        )
+    )
+    op.execute(
+        text(
+            "ALTER TABLE purchases "
+            "ADD CONSTRAINT purchases_user_id_fkey "
+            "FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE"
+        )
+    )

api/src/cartsnitch_api/models/purchase.py

@@ -32,7 +32,7 @@ class Purchase(UUIDPrimaryKeyMixin, TimestampMixin, Base):
 
     __tablename__ = "purchases"
 
-    user_id: Mapped[uuid.UUID] = mapped_column(ForeignKey("users.id"), nullable=False)
+    user_id: Mapped[str] = mapped_column(ForeignKey("users.id"), nullable=False)
     store_id: Mapped[uuid.UUID] = mapped_column(ForeignKey("stores.id"), nullable=False)
     store_location_id: Mapped[uuid.UUID | None] = mapped_column(ForeignKey("store_locations.id"))
     receipt_id: Mapped[str] = mapped_column(String(200), nullable=False)

api/src/cartsnitch_api/models/user.py

@@ -4,7 +4,7 @@ import uuid
 from datetime import datetime
 from typing import TYPE_CHECKING
 
-from sqlalchemy import DateTime, ForeignKey, String, UniqueConstraint
+from sqlalchemy import DateTime, ForeignKey, String, Text, UniqueConstraint
 from sqlalchemy.orm import Mapped, mapped_column, relationship
 
 from cartsnitch_api.constants import AccountStatus
@@ -16,11 +16,12 @@ if TYPE_CHECKING:
     from cartsnitch_api.models.store import Store
 
 
-class User(UUIDPrimaryKeyMixin, TimestampMixin, Base):
+class User(TimestampMixin, Base):
     """Application user."""
 
     __tablename__ = "users"
 
+    id: Mapped[str] = mapped_column(Text, primary_key=True)
     email: Mapped[str] = mapped_column(String(255), nullable=False, unique=True)
     hashed_password: Mapped[str] = mapped_column(String(255), nullable=False)
     display_name: Mapped[str | None] = mapped_column(String(100))
@@ -36,7 +37,7 @@ class UserStoreAccount(UUIDPrimaryKeyMixin, TimestampMixin, Base):
     __tablename__ = "user_store_accounts"
     __table_args__ = (UniqueConstraint("user_id", "store_id", name="uq_user_store_account"),)
 
-    user_id: Mapped[uuid.UUID] = mapped_column(ForeignKey("users.id"), nullable=False)
+    user_id: Mapped[str] = mapped_column(ForeignKey("users.id"), nullable=False)
     store_id: Mapped[uuid.UUID] = mapped_column(ForeignKey("stores.id"), nullable=False)
     session_data: Mapped[dict | None] = mapped_column(EncryptedJSON)
     session_expires_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))

api/src/cartsnitch_api/schemas.py

@@ -16,7 +16,7 @@ class UpdateUserRequest(BaseModel):
 
 
 class UserResponse(BaseModel):
-    id: UUID
+    id: str
     email: str
     display_name: str
     created_at: datetime

auth/src/auth.ts

@@ -36,6 +36,15 @@ export const auth = betterAuth({
   },
 
   session: {
+    modelName: "sessions",
+    fields: {
+      userId: "user_id",
+      expiresAt: "expires_at",
+      ipAddress: "ip_address",
+      userAgent: "user_agent",
+      createdAt: "created_at",
+      updatedAt: "updated_at",
+    },
     expiresIn: 60 * 60 * 24 * 7, // 7 days
     updateAge: 60 * 60 * 24, // refresh after 1 day
     cookieCache: {

e2e/fixtures.ts

@@ -0,0 +1,12 @@
+import { test as base, expect } from "@playwright/test";
+import AxeBuilder from "@axe-core/playwright";
+
+export const test = base.extend<{ axeCheck: void }>({
+  axeCheck: [async ({ page }, use) => {
+    await use();
+    const results = await new AxeBuilder({ page }).analyze();
+    expect(results.violations).toEqual([]);
+  }, { auto: true }],
+});
+
+export { expect } from "@playwright/test";

e2e/smoke.spec.ts

@@ -0,0 +1,6 @@
+import { test, expect } from "./fixtures";
+
+test("app loads", async ({ page }) => {
+  await page.goto("/");
+  await expect(page).toHaveTitle(/CartSnitch/);
+});

lighthouserc.json

@@ -0,0 +1,19 @@
+{
+  "ci": {
+    "collect": {
+      "staticDistDir": "./dist",
+      "url": ["http://localhost:4173/"],
+      "numberOfRuns": 1
+    },
+    "assert": {
+      "assertions": {
+        "categories:performance": ["warn", { "minScore": 0.7 }],
+        "categories:accessibility": ["error", { "minScore": 0.9 }],
+        "categories:best-practices": ["warn", { "minScore": 0.8 }]
+      }
+    },
+    "upload": {
+      "target": "temporary-public-storage"
+    }
+  }
+}

package.json

@@ -9,11 +9,13 @@
     "lint": "eslint .",
     "preview": "vite preview",
     "test": "NODE_ENV=test vitest run",
-    "test:watch": "NODE_ENV=test vitest"
+    "test:watch": "NODE_ENV=test vitest",
+    "test:e2e": "npx playwright test"
   },
   "dependencies": {
     "@tanstack/react-query": "^5.0.0",
     "better-auth": "^1.2.0",
+    "picomatch": "4.0.4",
     "react": "^18.3.1",
     "react-dom": "^18.3.1",
     "react-router-dom": "^7.0.0",
@@ -21,24 +23,32 @@
     "zustand": "^5.0.0"
   },
   "devDependencies": {
+    "@axe-core/playwright": "^4.10.0",
     "@eslint/js": "^9.39.4",
+    "@playwright/test": "^1.49.0",
     "@tailwindcss/vite": "^4.0.0",
     "@testing-library/jest-dom": "^6.6.3",
     "@testing-library/react": "^16.3.2",
     "@types/node": "^24.12.0",
     "@types/react": "^18.3.28",
     "@types/react-dom": "^18.3.7",
-    "@vitejs/plugin-react": "^4.5.2",
+    "@vitejs/plugin-react": "^4.7.0",
     "eslint": "^9.39.4",
     "eslint-plugin-react-hooks": "^7.0.1",
     "eslint-plugin-react-refresh": "^0.5.2",
     "globals": "^17.4.0",
     "jsdom": "^25.0.1",
+    "msw": "^2.12.14",
     "tailwindcss": "^4.0.0",
     "typescript": "^5.7.3",
     "typescript-eslint": "^8.56.1",
     "vite": "^6.3.5",
     "vite-plugin-pwa": "^0.21.2",
     "vitest": "^3.2.4"
+  },
+  "overrides": {
+    "@rollup/pluginutils": "5.3.0",
+    "flatted": "^3.4.2",
+    "serialize-javascript": "7.0.5"
   }
 }

playwright.config.ts

@@ -0,0 +1,19 @@
+import { defineConfig, devices } from '@playwright/test';
+
+export default defineConfig({
+  testDir: './e2e',
+  projects: [
+    {
+      name: 'chromium',
+      use: { ...devices['Desktop Chrome'] },
+    },
+  ],
+  webServer: {
+    command: 'npm run dev',
+    url: 'http://localhost:5173',
+    reuseExistingServer: !process.env.CI,
+  },
+  use: {
+    baseURL: 'http://localhost:5173',
+  },
+});

public/robots.txt

@@ -0,0 +1,4 @@
+User-agent: *
+Allow: /
+
+Sitemap: https://cartsnitch.com/sitemap.xml

src/hooks/__tests__/useApi.test.tsx

@@ -0,0 +1,45 @@
+import { renderHook, waitFor } from '@testing-library/react'
+import { QueryClient, QueryClientProvider } from '@tanstack/react-query'
+import { usePurchases } from '../useApi'
+import { http, HttpResponse } from 'msw'
+import { server } from '../../test/mocks/server'
+
+function createWrapper() {
+  const queryClient = new QueryClient({
+    defaultOptions: { queries: { retry: false } },
+  })
+  return function Wrapper({ children }: { children: React.ReactNode }) {
+    return (
+      <QueryClientProvider client={queryClient}>
+        {children}
+      </QueryClientProvider>
+    )
+  }
+}
+
+describe('useApi hooks', () => {
+  describe('usePurchases', () => {
+    it('fetches and returns purchases', async () => {
+      const { result } = renderHook(() => usePurchases(), { wrapper: createWrapper() })
+
+      await waitFor(() => expect(result.current.isSuccess).toBe(true))
+
+      expect(result.current.data).toHaveLength(1)
+      expect(result.current.data![0]).toMatchObject({
+        id: 'pur_1',
+        storeName: 'Kroger',
+        total: 42.5,
+      })
+    })
+
+    it('returns an error when the endpoint fails', async () => {
+      server.use(
+        http.get('/api/v1/purchases', () => HttpResponse.error()),
+      )
+
+      const { result } = renderHook(() => usePurchases(), { wrapper: createWrapper() })
+
+      await waitFor(() => expect(result.current.isError).toBe(true))
+    })
+  })
+})

src/pages/Dashboard.tsx

@@ -173,6 +173,7 @@ function AuthenticatedDashboard({ userName }: { userName: string }) {
 function DashboardSkeleton() {
   return (
     <div className="animate-pulse">
+      <h1 className="sr-only">Loading CartSnitch…</h1>
       <div className="h-8 w-40 rounded bg-gray-200" />
       <div className="mt-4 grid grid-cols-2 gap-3">
         <div className="h-24 rounded-xl bg-gray-200" />

src/test/mocks/handlers.ts

@@ -0,0 +1,65 @@
+import { http, HttpResponse } from 'msw'
+import type { Purchase, Product, Coupon, PriceAlert } from '../../types/api.ts'
+
+const mockPurchases: Purchase[] = [
+  {
+    id: 'pur_1',
+    storeId: 'store_1',
+    storeName: 'Kroger',
+    date: '2024-01-15',
+    total: 42.5,
+    items: [
+      { id: 'item_1', productId: 'prod_1', name: 'Milk', quantity: 1, price: 3.99, unitPrice: 3.99 },
+      { id: 'item_2', productId: 'prod_2', name: 'Bread', quantity: 2, price: 5.98, unitPrice: 2.99 },
+    ],
+  },
+]
+
+const mockProducts: Product[] = [
+  {
+    id: 'prod_1',
+    name: 'Whole Milk',
+    brand: 'Kroger',
+    category: 'Dairy',
+    prices: [{ storeId: 'store_1', storeName: 'Kroger', price: 3.99, lastUpdated: '2024-01-15' }],
+  },
+  {
+    id: 'prod_2',
+    name: 'Whole Wheat Bread',
+    brand: 'Nature\'s Own',
+    category: 'Bakery',
+    prices: [{ storeId: 'store_1', storeName: 'Kroger', price: 2.99, lastUpdated: '2024-01-15' }],
+  },
+]
+
+const mockCoupons: Coupon[] = [
+  {
+    id: 'coupon_1',
+    productId: 'prod_1',
+    storeName: 'Kroger',
+    description: '$1 off milk',
+    discount: '$1.00',
+    expiresAt: '2024-12-31',
+    code: 'MILK1',
+  },
+]
+
+const mockAlerts: PriceAlert[] = [
+  {
+    id: 'alert_1',
+    productId: 'prod_1',
+    productName: 'Whole Milk',
+    targetPrice: 2.99,
+    currentPrice: 3.99,
+    triggered: false,
+  },
+]
+
+export const handlers = [
+  http.get('/api/v1/health', () => HttpResponse.json({ status: 'ok' })),
+  http.get('/api/v1/purchases', () => HttpResponse.json(mockPurchases)),
+  http.get('/api/v1/products', () => HttpResponse.json(mockProducts)),
+  http.get('/api/v1/products/prod_1', () => HttpResponse.json(mockProducts[0])),
+  http.get('/api/v1/coupons', () => HttpResponse.json(mockCoupons)),
+  http.get('/api/v1/price-alerts', () => HttpResponse.json(mockAlerts)),
+]

src/test/mocks/server.ts

@@ -0,0 +1,4 @@
+import { setupServer } from 'msw/node'
+import { handlers } from './handlers'
+
+export const server = setupServer(...handlers)

src/test/setup.ts

@@ -1 +1,6 @@
 import '@testing-library/jest-dom/vitest'
+import { server } from './mocks/server'
+
+beforeAll(() => server.listen())
+afterEach(() => server.resetHandlers())
+afterAll(() => server.close())

vitest.config.ts

@@ -7,5 +7,6 @@ export default defineConfig({
     environment: 'jsdom',
     globals: true,
     setupFiles: ['./src/test/setup.ts'],
+    exclude: ['e2e/**', 'node_modules/**'],
   },
 })