feat: fix the 404 issue with the homepage link and refactoring the tiny-robot menu

[wuyiping0628]

Summary by CodeRabbit

• Chores

  • Updated documentation links so the "引入与使用" entry points to the quick-start guide.
  • Consolidated sidebar navigation for TinyRobot into a shared structure for more consistent access.
  • Added redirects so key TinyRobot section URLs land on their primary overview pages.

• Bug Fixes

  • Improved header navigation logic to highlight the correct product tab across related docs.

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[coderabbitai]

Walkthrough

Centralized tiny-robot sidebar config and route rewrites, adjusted home navigation link, added extra tiny-robot redirect mappings, and changed navigation-tab logic to treat multiple tiny-robot/related paths as the product guide tab.

Changes

Cohort / File(s)	Summary
Home link change \.vitepress/theme/home/index.vue	Changed right-side TinyRobot link target: /tiny-robot/guide/usage.html#引入与使用 → /tiny-robot/guide/quick-start.html#引入与使用.
Sidebar & route rewrites \.vitepress/config\.mts	Introduced robotSidebarItems shared constant; replaced per-route sidebar blocks for /tiny-robot/guide/, /tiny-robot/components/, /tiny-robot/tools/ with the shared sidebar; added rewrites mapping tiny-robot/docs/src/guide/:path* → tiny-robot/guide/:path*, .../components/:path* → tiny-robot/components/:path*, .../tools/:path* → tiny-robot/tools/:path* while retaining existing mappings.
Redirect mappings \.vitepress/theme/Layout\.vue	Added redirect patterns routing `/tiny-robot/components(.html
Nav tab logic \.vitepress/theme/components/CustomHeader\.vue	Added computed ifProductTab boolean to centralize route/path checks; navigation now treats those product-related paths as the "guide" tab (sets active tab to "guide" when true).

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

Poem

🐰 In burrows bright I hop and cheer,
Links rebloom and routes appear,
A sidebar stitched, redirects set,
Tiny-robot's paths are neatly met. ✨

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Title check	✅ Passed	The title 'feat: fix the 404 issue with the homepage link and refactoring the tiny-robot menu' accurately describes the main changes: addressing a 404 issue in homepage links and restructuring the tiny-robot menu configuration.

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✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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