fix(web): stabilize Home and Studio route titles

[lyzno1]

Summary

• move the fixed Home and Studio titles from client effects to their App Router page metadata owners
• reuse the existing server-side localized metadata helper and root branding template
• remove the duplicate title effects from the Home and Apps content components

Fixes SNP-740

Validation

• vp staged
• vp test run --project unit app/__tests__/route-metadata.spec.ts features/home/home-content/__tests__/home-content.spec.tsx app/components/apps/__tests__/index.spec.tsx (65 tests)
• browser-verified direct loads and SPA navigation for / and /apps on localhost:3000

Screenshots

Not applicable; this changes document metadata without changing visible page layout.

From Codex

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.93%. Comparing base (bda60a3) to head (300fab0).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #41654      +/-   ##
==========================================
- Coverage   86.93%   86.93%   -0.01%     
==========================================
  Files        5309     5311       +2     
  Lines      306039   306044       +5     
  Branches    61329    61329              
==========================================
+ Hits       266061   266063       +2     
- Misses      34691    34694       +3     
  Partials     5287     5287              

Flag	Coverage Δ
dify-ui	93.75% <ø> (ø)
web	87.07% <100.00%> (-0.01%)	⬇️

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