Feat v0.3.6 demo workflows + interactive demo

Four example workflow packages proving the engine end-to-end:
- Bug Report Triage: public entry, branch routing, SLA timer
- Employee Onboarding: Starlark automated stages, signoff gate
- Content Approval: multi-party signoff, revision cycle loop
- Webhook Notifier: http.post, connections fallback, delivery logging

Demo surface at /s/workflow-demo with cards, stage diagrams, Starlark
viewer, API examples, active/published status, and copyable public links.

Engine fixes: started_by in automated context, sla_seconds in package
installer, parseSnapshotStages for wrapped/legacy formats.

Platform fixes: extension SDK boot in base.html (Preact globals + boot()),
admin teams paginated response extraction, workflow adoption endpoint
(POST /teams/:teamId/workflows/:id/adopt), team-admin copyable link.

Review pass remains on roadmap for remaining UI polish.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

server/store/postgres/workflows.go

@@ -115,6 +115,9 @@ func (s *WorkflowStore) Update(ctx context.Context, id string, patch models.Work
 	if patch.Description != nil {
 		add("description", *patch.Description)
 	}
+	if patch.TeamID != nil {
+		add("team_id", *patch.TeamID)
+	}
 	if patch.Branding != nil {
 		add("branding", string(*patch.Branding))
 	}

server/store/sqlite/workflows.go

@@ -73,6 +73,10 @@ func (s *WorkflowStore) Update(ctx context.Context, id string, patch models.Work
 		sets = append(sets, "description = ?")
 		args = append(args, *patch.Description)
 	}
+	if patch.TeamID != nil {
+		sets = append(sets, "team_id = ?")
+		args = append(args, *patch.TeamID)
+	}
 	if patch.Branding != nil {
 		sets = append(sets, "branding = ?")
 		args = append(args, string(*patch.Branding))