Add AI service dashboard endpoint

internal/httpapi/dashboard.go

@@ -0,0 +1,85 @@
+package httpapi
+
+import (
+	"net/http"
+	"time"
+
+	"ai-service/internal/model"
+)
+
+type dashboardResponse struct {
+	At        time.Time               `json:"at"`
+	Summary   dashboardSummary        `json:"summary"`
+	Stats     *model.Stats            `json:"stats"`
+	Providers providersStatusResponse `json:"providers"`
+	Infra     infraStatusResponse     `json:"infra"`
+	Jobs      []*model.Job            `json:"jobs"`
+}
+
+type dashboardSummary struct {
+	Pending   int64 `json:"pending"`
+	Running   int64 `json:"running"`
+	Done      int64 `json:"done"`
+	Failed    int64 `json:"failed"`
+	Cancelled int64 `json:"cancelled"`
+	Total     int64 `json:"total"`
+}
+
+func (s *Server) handleDashboard(w http.ResponseWriter, r *http.Request) {
+	now := time.Now().UTC()
+	ctx, cancel := contextWithTimeout(r, 12*time.Second)
+	defer cancel()
+
+	stats, err := s.store.Stats(ctx)
+	if err != nil {
+		writeError(w, http.StatusInternalServerError, err.Error())
+		return
+	}
+	jobs, err := s.store.ListJobs(ctx, model.JobFilter{
+		Statuses: []string{model.StatusFailed, model.StatusRunning},
+		Limit:    40,
+	})
+	if err != nil {
+		writeError(w, http.StatusInternalServerError, err.Error())
+		return
+	}
+
+	resp := dashboardResponse{
+		At:      now,
+		Summary: summarizeQueues(stats),
+		Stats:   stats,
+		Providers: providersStatusResponse{
+			At: now,
+			Providers: []providerStatus{
+				s.checkLLM(ctx),
+				s.checkWhisperX(ctx),
+			},
+		},
+		Infra: loadInfraSnapshot(r, s.cfg),
+		Jobs:  jobs,
+	}
+	writeJSON(w, http.StatusOK, resp)
+}
+
+func summarizeQueues(stats *model.Stats) dashboardSummary {
+	var out dashboardSummary
+	if stats == nil {
+		return out
+	}
+	for _, row := range stats.Queues {
+		switch row.Status {
+		case model.StatusPending:
+			out.Pending += row.Total
+		case model.StatusRunning:
+			out.Running += row.Total
+		case model.StatusDone:
+			out.Done += row.Total
+		case model.StatusFailed:
+			out.Failed += row.Total
+		case model.StatusCancelled:
+			out.Cancelled += row.Total
+		}
+		out.Total += row.Total
+	}
+	return out
+}