fix(scan): Fix-mode scanner + dialog suppression + cancel/timer + importer revive

- scan.jsx: app.beginSuppressDialogs() + clean quit (no AE hang on font/footage
  dialogs); FIX-mode branch parses frl_c(x)t/m(y) layer names → scenes by c(x);
  flexible/mockup keep comp-based walk; FR_SCAN_MODE selects.
- render-svc: scan job carries project mode; cancel endpoint + node watchdog that
  kills AE on cancel; parseObjectURL handles minio:// (bucket in host); scan with
  no template fails cleanly; status guards so late results can't un-cancel.
- content importer: revive soft-deleted scenes instead of duplicate-inserting
  (fixes scenes_project_id_key unique violation); orphan diff ignores deleted.
- admin: scan dialog gets project-type picker + elapsed timer + Cancel button.
- node-agent: AE-2026 wiring (host port 5010, host-reachable presign endpoint),
  FR_SCAN_MODE plumbing. docs/aep-template-convention.md: per-type naming + bundles.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

services/render/internal/handlers/scan.go

@@ -173,19 +173,27 @@ func extractAepFromZip(zb []byte) ([]byte, error) {
 }
 
 // ── AE scan jobs (async, full fidelity) ───────────────────────────────────────
-// POST /v1/template-scans/:project_id/jobs  (admin)
+// POST /v1/template-scans/:project_id/jobs  (admin)  body: {"mode":"fix|flexible|mockup|musicvisualizer"}
 func (h *ScanHandler) CreateJob(c *gin.Context) {
 	pid, err := uuid.Parse(c.Param("project_id"))
 	if err != nil {
 		c.JSON(http.StatusBadRequest, models.APIError{Code: "bad_request", Message: "invalid project_id"})
 		return
 	}
-	id, err := h.store.CreateScanJob(c.Request.Context(), pid, "ae-jsx")
+	var req struct {
+		Mode string `json:"mode"`
+	}
+	_ = c.ShouldBindJSON(&req)
+	mode := strings.ToLower(strings.TrimSpace(req.Mode))
+	if mode == "" {
+		mode = "flexible"
+	}
+	id, err := h.store.CreateScanJob(c.Request.Context(), pid, "ae-jsx", mode)
 	if err != nil {
 		c.JSON(http.StatusInternalServerError, models.APIError{Code: "internal_error", Message: err.Error()})
 		return
 	}
-	c.JSON(http.StatusOK, gin.H{"id": id, "status": "queued"})
+	c.JSON(http.StatusOK, gin.H{"id": id, "status": "queued", "mode": mode})
 }
 
 // GET /v1/template-scan-jobs/:id  (admin)
@@ -223,9 +231,18 @@ func (h *ScanHandler) Claim(c *gin.Context) {
 		return
 	}
 	url, isBundle, md5 := resolveTemplateObject(h.minio, h.templatesBucket, claim.ProjectID)
+	if url == "" {
+		// No template object stored for this project — fail the job with a clear
+		// message instead of handing the node an empty URL.
+		_ = h.store.SetScanError(c.Request.Context(), claim.ID,
+			"no template stored for this project — upload the .aep from «فایل‌ها» first")
+		c.Status(http.StatusNoContent)
+		return
+	}
 	c.JSON(http.StatusOK, gin.H{
 		"scan_job_id":      claim.ID,
 		"project_id":       claim.ProjectID,
+		"mode":             claim.Mode,
 		"aep_download_url": url,
 		"is_bundle":        isBundle,
 		"bundle_md5":       md5,
@@ -272,6 +289,35 @@ func (h *ScanHandler) Fail(c *gin.Context) {
 	c.Status(http.StatusNoContent)
 }
 
+// POST /v1/template-scan-jobs/:id/cancel  (admin)
+func (h *ScanHandler) Cancel(c *gin.Context) {
+	id, err := uuid.Parse(c.Param("id"))
+	if err != nil {
+		c.JSON(http.StatusBadRequest, models.APIError{Code: "bad_request", Message: "invalid id"})
+		return
+	}
+	if err := h.store.CancelScanJob(c.Request.Context(), id); err != nil {
+		c.JSON(http.StatusInternalServerError, models.APIError{Code: "internal_error", Message: err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"status": "cancelled"})
+}
+
+// GET /v1/internal/scan/:id/status  (node watchdog, HMAC) → {"status": "..."}
+func (h *ScanHandler) Status(c *gin.Context) {
+	id, err := uuid.Parse(c.Param("id"))
+	if err != nil {
+		c.JSON(http.StatusBadRequest, models.APIError{Code: "bad_request", Message: "invalid id"})
+		return
+	}
+	st, err := h.store.GetScanStatus(c.Request.Context(), id)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, models.APIError{Code: "internal_error", Message: err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"status": st})
+}
+
 // resolveTemplateObject presigns the canonical template object for a project,
 // probing bundle.zip → template.aep → template.aepx (same order as render claim).
 func resolveTemplateObject(mc *minio.Client, bucket string, projectID uuid.UUID) (url string, isBundle bool, md5 string) {