Add automatic Gitea label creation and repository edit functionality

- Implement automatic label creation when registering repositories:
  • bzzz-task (red) - Issues for CHORUS BZZZ task assignments
  • whoosh-monitored (teal) - Repository monitoring indicator
  • priority-high/medium/low labels for task prioritization
- Add repository edit modal with full configuration options
- Add manual "Labels" button to ensure labels for existing repos
- Enhance Gitea client with CreateLabel, GetLabels, EnsureRequiredLabels methods
- Add POST /api/v1/repositories/{id}/ensure-labels endpoint
- Fix label creation error handling with graceful degradation

🤖 Generated with [Claude Code](https://claude.ai/code)

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

internal/gitea/webhook.go

@@ -178,7 +178,7 @@ func (h *WebhookHandler) ProcessWebhook(payload *WebhookPayload) *WebhookEvent {
 			log.Info().
 				Str("action", payload.Action).
 				Str("repository", payload.Repository.FullName).
-				Int("issue_number", payload.Issue.Number).
+				Int64("issue_number", payload.Issue.Number).
 				Str("title", payload.Issue.Title).
 				Msg("Processing task issue webhook")
 		}