Merge pull request #44 from BU-Spark/feat/ci-and-tests

feat(mobile): add Jest tests and CI pipeline

Author: arnavSingh23

.github/workflows/README.md

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+# CI Workflows
+
+This project uses **GitHub Actions** for continuous integration.
+
+## Workflows Included
+
+- **Mobile Lint**  
+  Runs ESLint in the `mobile/` app directory to enforce code quality and catch errors early.
+
+- **Backend RBAC E2E**  
+  Runs Jest end-to-end tests in `backend/` to verify secure role-based access control.
+
+## How They Run
+
+| Workflow | Trigger |
+|---------|---------|
+| Mobile Lint | Push to `main` / `dev` + all pull requests |
+| Backend RBAC E2E | Push to `main` / `dev` or manual trigger |
+
+## Challenges
+
+- Ensuring proper working directories for monorepo structure (Fixed using `defaults.run.working-directory`)
+- Performance during installs (Fixed by caching Node dependency installs)
+
+## In the Future
+
+As we add more testing suites, we will expand our CI pipeline accordingly.  
+
+We plan to include full mobile end-to-end testing using [Detox](https://wix.github.io/Detox/) to ensure the entire app behaves correctly on real devices (soon!).

.github/workflows/backend-rbac-e2e.yml

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+name: Backend RBAC E2E
+
+on:
+  push:
+    branches: [main, dev, feat/ci-and-tests]
+  workflow_dispatch:
+
+jobs:
+  rbac-e2e:
+    runs-on: ubuntu-latest
+
+    defaults:
+      run:
+        working-directory: backend
+
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v4
+
+      - name: Set up Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: 24
+          cache: npm
+          cache-dependency-path: backend/package-lock.json
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Run RBAC E2E Jest tests
+        env:
+          BASE: ${{ secrets.BASE }}
+          CLERK_SECRET_KEY: ${{ secrets.CLERK_SECRET_KEY }}
+          STUDENT_ID: ${{ secrets.STUDENT_ID }}
+          ADMIN_ID: ${{ secrets.ADMIN_ID }}
+        run: npm test

.github/workflows/mobile-lint.yml

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+name: Mobile Lint
+
+on:
+  push:
+    branches: [main, dev]
+  pull_request:
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+
+    defaults:
+      run:
+        working-directory: mobile
+
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v4
+
+      - name: Set up Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: 24
+          cache: npm
+          cache-dependency-path: mobile/package-lock.json
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Lint with ESLint (Expo)
+        run: npm run lint