Live onboarding wizard: real discovery, repo pick, and bootstrap

The 4-step wizard is now fully live — nothing faked.

Backend (core + main):
- GiteaClient.createLabel (POST /labels).
- core/gitea/bootstrap.ts: SCHEMA_LABELS (the full est/p/deadline vocabulary with
  colors+descriptions), applySchemaLabels (idempotent — creates only missing),
  repoExists + ensurePmStateRepo (token-scoped, org vs personal endpoint). 7 tests.
- config:bootstrap IPC handler + preload bridge + BootstrapResult type.

Wizard:
- Connect step → live config.discover ('connected · N repos visible' is real).
- Repo step → owner dropdown + repo radios from the discovered repos.
- Bootstrap step → real: applies the label schema + ensures the pm-state sidecar,
  shows the actual outcome (created vs already-present), then saves config.
- Gate: first run (no config) → wizard; reconnect (existing) → the compact card.
  Removed the dead 'firstrun' dev view.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

packages/core/src/index.ts

@@ -13,6 +13,8 @@ export { createGiteaClient, normalizeIssue, normalizeMilestone, normalizeTimelin
 export type { GiteaClient, ListIssuesOptions } from './gitea/client.js'
 export { discoverRepos } from './gitea/discover.js'
 export type { DiscoveredRepos } from './gitea/discover.js'
+export { applySchemaLabels, ensurePmStateRepo, repoExists, SCHEMA_LABELS } from './gitea/bootstrap.js'
+export type { LabelSyncResult, SchemaLabelDef } from './gitea/bootstrap.js'
 export { GiteaApiError } from './gitea/types.js'
 export type {
   FetchLike,