test: add comprehensive unit tests and CI workflow

Add unit tests for:
- Branch name validation and sanitization (git adapter)
- Session name sanitization (domain)
- Git URL parsing and comparison (git adapter)
- Notification service event handling and execution ID resolution
- Token stats service caching and aggregation
- Session service delete and rename operations
- JSONL parser for token usage extraction

Also includes:
- GitHub Actions workflow for running tests on PRs
- Updated mockery config with new interfaces
- Updated testing.md with unit test guidelines

Author: renato0307

.claude/rules/testing.md

@@ -1,2 +1,59 @@
+# Testing Guidelines
 
-This is a proof of concept, you don't need to implement unit tests.
+## Running Unit Tests
+
+```bash
+# Run all unit tests
+go test ./internal/...
+
+# Run tests with verbose output
+go test ./internal/... -v
+
+# Run tests with coverage
+go test ./internal/... -cover
+
+# Run specific test
+go test ./internal/services/... -run TestCreateSession
+```
+
+## Test Patterns
+
+Follow the established patterns from existing tests:
+
+```go
+func TestFunctionName_Scenario(t *testing.T) {
+    // Create mocks
+    gitRepo := portsmocks.NewMockGitRepository(t)
+
+    // Setup expectations
+    gitRepo.EXPECT().Method(mock.Anything).Return(value, nil)
+
+    // Create service
+    service := NewService(gitRepo)
+
+    // Execute
+    result, err := service.Method(...)
+
+    // Assert
+    require.NoError(t, err)
+    assert.Equal(t, expected, result)
+}
+```
+
+## Mocks
+
+Mocks are generated using mockery. Config is in `.mockery.yaml`.
+
+```bash
+# Regenerate mocks after adding interfaces
+mockery
+```
+
+## Test Coverage
+
+Focus unit tests on:
+- Pure functions (validation, sanitization, parsing)
+- Service layer with mocked dependencies
+- Error handling paths
+
+Integration tests run in Docker (see testing_safety.md).

.github/workflows/test.yml

@@ -0,0 +1,62 @@
+name: Test
+
+on:
+  pull_request:
+    branches: [main]
+  push:
+    branches: [main]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: '1.25.6'
+
+      - name: Download dependencies
+        run: go mod download
+
+      - name: Run tests
+        run: go test ./internal/... -v -race -coverprofile=coverage.out
+
+      - name: Upload coverage
+        uses: codecov/codecov-action@v4
+        with:
+          files: coverage.out
+          fail_ci_if_error: false
+        continue-on-error: true
+
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: '1.25.6'
+
+      - name: Run golangci-lint
+        uses: golangci/golangci-lint-action@v6
+        with:
+          version: latest
+
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: '1.25.6'
+
+      - name: Build
+        run: go build -o rocha ./cmd

.mockery.yaml

@@ -12,9 +12,12 @@ packages:
       ProcessInspector: {}
       SessionReader: {}
       SessionRepository: {}
+      SessionStateUpdater: {}
       SessionWriter: {}
+      SoundPlayer: {}
       TmuxClient: {}
       TmuxSessionLifecycle: {}
+      TokenUsageReader: {}
   github.com/renato0307/rocha/internal/services:
     interfaces:
       ClaudeDirResolver: {}