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/cmd/server/main.go

@@ -157,6 +157,7 @@ func main() {
 	v1.POST("/template-scans/:project_id/quick", auth, admin, scanH.QuickScan) // headless Go quick-scan
 	v1.POST("/template-scans/:project_id/jobs", auth, admin, scanH.CreateJob)  // queue an AE full scan
 	v1.GET("/template-scan-jobs/:id", auth, admin, scanH.GetJob)
+	v1.POST("/template-scan-jobs/:id/cancel", auth, admin, scanH.Cancel)
 
 	// ── Exports management (admin: all users' rendered videos) ────────────────
 	adminExports := v1.Group("/admin-exports", auth, admin)
@@ -185,6 +186,7 @@ func main() {
 
 		// AE scan jobs (node claims, runs scan.jsx, posts the ScanResult back)
 		internal.POST("/scan/claim", scanH.Claim)
+		internal.GET("/scan/:id/status", scanH.Status) // node watchdog (cancel detection)
 		internal.POST("/scan/:id/result", scanH.Result)
 		internal.POST("/scan/:id/fail", scanH.Fail)
 	}