feat: Phase 2.7+3 — full integration, config update, systemd unit

- Wire all goroutines in main.go: watcher, quota monitor, account
  switcher, dispatcher, janitor, and 10s state flush loop
- Add missing sections to config.example.yaml: notifications,
  dispatcher, watcher, janitor
- Add scripts/claude-failover.service systemd unit

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

internal/janitor/janitor_test.go

@@ -0,0 +1,96 @@
+package janitor
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"testing"
+	"time"
+
+	"forge.secuaas.ovh/olivier/claude-failover/internal/state"
+)
+
+func TestNew(t *testing.T) {
+	s := state.New("/tmp/test-state.json")
+	j := New(s, "/tmp/projects")
+
+	if j == nil {
+		t.Fatal("New() returned nil")
+	}
+	if j.interval != defaultInterval {
+		t.Errorf("expected interval %v, got %v", defaultInterval, j.interval)
+	}
+	if j.state != s {
+		t.Error("state not assigned correctly")
+	}
+	if j.projectsDir != "/tmp/projects" {
+		t.Errorf("projectsDir not assigned correctly: %s", j.projectsDir)
+	}
+	if j.logger == nil {
+		t.Error("logger should not be nil")
+	}
+}
+
+func TestCleanupStaleAgentDoneFiles(t *testing.T) {
+	// Create a stale file (older than 1h).
+	staleFile := fmt.Sprintf("/tmp/agent-done-test-%d", time.Now().UnixNano())
+	if err := os.WriteFile(staleFile, []byte("done"), 0644); err != nil {
+		t.Fatalf("create stale file: %v", err)
+	}
+	// Age the file to 2 hours ago.
+	old := time.Now().Add(-2 * time.Hour)
+	if err := os.Chtimes(staleFile, old, old); err != nil {
+		t.Fatalf("chtimes: %v", err)
+	}
+
+	// Create a recent file (should NOT be deleted).
+	recentFile := fmt.Sprintf("/tmp/agent-done-test-recent-%d", time.Now().UnixNano())
+	if err := os.WriteFile(recentFile, []byte("recent"), 0644); err != nil {
+		t.Fatalf("create recent file: %v", err)
+	}
+	defer os.Remove(recentFile)
+
+	s := state.New("/tmp/test-state.json")
+	j := New(s, "/tmp/projects")
+	j.cleanupStaleAgentDoneFiles()
+
+	// Stale file should be gone.
+	if _, err := os.Stat(staleFile); !os.IsNotExist(err) {
+		os.Remove(staleFile)
+		t.Errorf("stale file %s should have been deleted", staleFile)
+	}
+
+	// Recent file should still exist.
+	if _, err := os.Stat(recentFile); os.IsNotExist(err) {
+		t.Errorf("recent file %s should NOT have been deleted", recentFile)
+	}
+}
+
+func TestCleanupOrphanDispatchMeta(t *testing.T) {
+	tmpDir := t.TempDir()
+	inboxDir := filepath.Join(tmpDir, ".agent-queue", "inbox")
+	if err := os.MkdirAll(inboxDir, 0755); err != nil {
+		t.Fatal(err)
+	}
+
+	// Create a task file and its dispatch-meta.
+	taskFile := filepath.Join(inboxDir, "my-task.md")
+	metaFile := taskFile + ".dispatch-meta"
+	os.WriteFile(taskFile, []byte("task"), 0644)
+	os.WriteFile(metaFile, []byte("meta"), 0644)
+
+	s := state.New("/tmp/test-state.json")
+	j := New(s, tmpDir)
+
+	// No working sessions → dispatch-meta should be removed.
+	workingByTask := make(map[string]struct{})
+	j.cleanupOrphanDispatchMeta(inboxDir, workingByTask)
+
+	if _, err := os.Stat(metaFile); !os.IsNotExist(err) {
+		t.Errorf("orphan dispatch-meta %s should have been deleted", metaFile)
+	}
+	// Task file itself should still exist.
+	if _, err := os.Stat(taskFile); os.IsNotExist(err) {
+		t.Errorf("task file %s should NOT have been deleted", taskFile)
+	}
+}