docs(help): restructure Help tab sidebar and shorten FAQ / live-tests titles

docs/help/faq-first-run.md

@@ -4,7 +4,8 @@ read_when:
   - New install, onboarding stuck, or first-run errors
   - Choosing auth and provider subscriptions
   - Cannot access docs.openclaw.ai, cannot open dashboard, install stuck
-title: "FAQ — quick start and first-run setup"
+title: "FAQ: first-run setup"
+sidebarTitle: "First-run FAQ"
 ---
 
 Quick-start and first-run Q&A. For everyday operations, models, auth, sessions,

docs/help/faq-models.md

@@ -4,7 +4,8 @@ read_when:
   - Choosing or switching models, configuring aliases
   - Debugging model failover / "All models failed"
   - Understanding auth profiles and how to manage them
-title: "FAQ — models and auth profiles"
+title: "FAQ: models and auth"
+sidebarTitle: "Models FAQ"
 ---
 
 Model- and auth-profile Q&A. For setup, sessions, gateway, channels, and

docs/help/testing-live.md

@@ -4,7 +4,8 @@ read_when:
   - Running live model matrix / CLI backend / ACP / media-provider smokes
   - Debugging live-test credential resolution
   - Adding a new provider-specific live test
-title: "Testing — live suites"
+title: "Testing: live suites"
+sidebarTitle: "Live tests"
 ---
 
 For quick start, QA runners, unit/integration suites, and Docker flows, see