feat(arcrun): mira wiki page with tag filter + accumulated WIP

- landing/app/mira/wiki: tag=mira-wiki list now shows all wiki paragraphs
  (depends on KBDB tag filter exposed in matrix/kbdb commit, separate repo)
- landing: app/mira hub + feed split + various WIP from prior sessions
- registry/components: claude_api / kbdb_create_block / kbdb_get / km_writer /
  platform_crypto / auth_oauth2 contracts + main.go (accumulated)
- .component-builds: pkg-lock updates + index.ts adjustments (WIP)
- .agents/specs/arcrun/frontend-redesign: design notes
- docs/test_credentials, docs/user_requirements/arcrun-landing-page: WIP docs
- cypher-executor: auth-dispatcher / wasi-shim adjustments (WIP)

Includes accumulated work from prior sessions plus the wiki UI tag-filter
update that surfaces the AI-generated wiki paragraphs at /mira/wiki.

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

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

.github/workflows/deploy.yml

@@ -249,6 +249,18 @@ jobs:
           CLOUDFLARE_ACCOUNT_ID: ${{ secrets.CLOUDFLARE_ACCOUNT_ID }}
         run: pnpm exec wrangler deploy
 
+      # 部署成功後自動把 contract 灌進 component-registry index
+      # SDD: matrix/arcrun/.agents/specs/component-registry-canon/design.md Phase 2
+      # degraded mode：失敗只 warning 不擋部署
+      # 邏輯實作在 registry/scripts/register-component.sh（本地+CI 共用 SSOT）
+      - name: Register component in registry
+        if: success()
+        run: |
+          set -uo pipefail
+          python3 -c "import yaml" 2>/dev/null || pip install --quiet pyyaml
+          bash registry/scripts/register-component.sh "${{ matrix.worker.name }}" || \
+            echo "::warning::Registry 註冊失敗（degraded mode）"
+
   # ── Job 2b:Tier 2 並行部署(orchestration Worker,可能有 service binding 相依於 tier1) ─
   # needs: deploy-tier1 → tier1 全綠才開始;首次部署時避免 service binding target 未存在。
   deploy-tier2: