feat(render+templates): Remotion engine, 16 branded templates (incl. 3D), seconds pricing, coming-soon

Render engine
- Add Remotion (code-based) as a 2nd render engine alongside After Effects.
  node-agent dispatches on Job.Engine; RunRemotion maps bindings -> --props,
  renders native then ffmpeg-scales to the quality tier (aspect-preserving).
- content.projects.render_engine + render_remotion_comp (migration 32);
  render-svc claim resolves engine and routes (skips .aep for Remotion).
- Admin TemplatesAdmin gains an engine picker + Remotion composition id field.

Template pack (services/remotion)
- 16 branded, Persian (Vazirmatn), color- and text-editable templates, each in
  3 aspects (16:9 / 1:1 / 9:16): LogoMotion, Opener, InstaPromo, YouTubeIntro,
  Slideshow, HappyBirthday, SalePromo, QuoteCard, EventInvite, Countdown,
  GlitterReveal (editable logo image), NowruzGreeting (animated characters),
  and 4 cinematic 3D templates via @remotion/three (Hero3D, Nowruz3D,
  Birthday3D, Promo3D) with reflections + bloom/DOF/vignette.
- scripts/seed_remotion_templates.py seeds containers/projects/scenes/colors.

Pricing
- Rewrite /pricing to the seconds-based model (charge = length x resolution),
  data-driven from /v1/plans, Toman, broker checkout.

Coming-soon
- Persian experimental-build overlay on all pages (launch date + countdown).

Fixes
- middleware matcher bypasses all static asset paths; catalog mapping passes
  cover image + preview video so real thumbnails render.

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

services/render/internal/db/db.go

@@ -666,6 +666,42 @@ func (s *Store) GetTemplateCompName(ctx context.Context, originalProjectID uuid.
 	return *comp, nil
 }
 
+// TemplateRenderConfig describes how a template should be rendered.
+type TemplateRenderConfig struct {
+	// Engine is "AfterEffects" or "Remotion".
+	Engine string
+	// CompName is the composition to render: render_aep_comp for AE, or
+	// render_remotion_comp for Remotion.
+	CompName string
+}
+
+// GetTemplateRenderConfig resolves the render engine + composition for a template.
+// For Remotion templates the composition id comes from render_remotion_comp; for
+// After Effects it comes from render_aep_comp. Defaults to AfterEffects when the
+// render_engine column is missing/empty (older rows pre-migration).
+func (s *Store) GetTemplateRenderConfig(ctx context.Context, originalProjectID uuid.UUID) (TemplateRenderConfig, error) {
+	var engine *string
+	var aepComp, remotionComp *string
+	err := s.pool.QueryRow(ctx,
+		`SELECT render_engine, render_aep_comp, render_remotion_comp
+		   FROM content.projects WHERE id = $1`, originalProjectID).Scan(&engine, &aepComp, &remotionComp)
+	if err != nil {
+		return TemplateRenderConfig{}, err
+	}
+	cfg := TemplateRenderConfig{Engine: "AfterEffects"}
+	if engine != nil && *engine != "" {
+		cfg.Engine = *engine
+	}
+	if cfg.Engine == "Remotion" {
+		if remotionComp != nil {
+			cfg.CompName = *remotionComp
+		}
+	} else if aepComp != nil {
+		cfg.CompName = *aepComp
+	}
+	return cfg, nil
+}
+
 // GetRenderBindings returns the user's edited input values for a saved project so the
 // node can write them into the AE project before rendering (the render binder). Only
 // inputs with a non-empty value are returned (defaults are already in the template).