fix(homepage): guard blog category load

[OleksandrMrn]

Description

Prevents optional blog category navigation data from crashing the localized homepage layout when database access fails.

Also normalizes NEXT_PUBLIC_SITE_URL before building homepage canonical and alternate metadata links, avoiding double slashes like //uk.

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Related Issue

Issue: N/A

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Changes

• Guard optional blog category loading in the locale layout
• Return an empty category list when blog categories cannot be loaded
• Leave locale message loading unchanged
• Normalize homepage metadata URLs when NEXT_PUBLIC_SITE_URL has a trailing slash

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Database Changes (if applicable)

• Schema migration required
• Seed data updated
• Breaking changes to existing queries
• Transaction-safe migration
• Migration tested locally on Neon

N/A, no database schema or query changes.

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How Has This Been Tested?

• Tested locally
• Verified in development environment
• Checked responsive layout (if UI-related)
• Tested accessibility (keyboard / screen reader)

Tested locally with the Next.js dev server:

• /uk loads successfully
• /en loads successfully
• Verified the homepage no longer returns 500 when blog category loading fails
• Ran lint/checks for the changed files

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Screenshots (if applicable)

N/A

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Checklist

Before submitting

• Code has been self-reviewed
• No TypeScript or console errors
• Code follows project conventions
• Scope is limited to this feature/fix
• No unrelated refactors included
• English used in code, commits, and docs
• No new dependencies added
• Database migration tested locally (if applicable)
• GitHub Projects card moved to In Review

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Reviewers

• @ViktorSvertoka
• @AndrewMotko

Summary by CodeRabbit

• Bug Fixes
  • Improved site URL handling so generated links are consistently formatted, avoiding issues with trailing slashes.
  • Made blog category loading more resilient by falling back gracefully if category data can’t be retrieved, helping pages continue to load smoothly.

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[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

Run ID: 6c568391-531e-4e24-89e1-246bb9451773

📥 Commits

Reviewing files that changed from the base of the PR and between f8ffed5 and 2b54f88.

📒 Files selected for processing (2)

• frontend/app/[locale]/layout.tsx
• frontend/app/[locale]/page.tsx

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📝 Walkthrough

Walkthrough

The locale layout's blog-category loading is refactored into a local getLayoutBlogCategories helper that uses a dynamic import and catches errors by logging and returning an empty array. Separately, generateMetadata normalizes NEXT_PUBLIC_SITE_URL by stripping any trailing slash before constructing URLs.

Layout resilience improvements

Layer / File(s)	Summary
Blog categories dynamic import with error fallback frontend/app/[locale]/layout.tsx	Adds BlogCategory type and getLayoutBlogCategories(locale) helper with dynamic import, success return, and [] fallback on error. LocaleLayout's Promise.all is updated to call this helper instead of the prior direct cached-query reference.
siteUrl trailing-slash normalization frontend/app/[locale]/page.tsx	generateMetadata now strips a trailing / from NEXT_PUBLIC_SITE_URL (or its fallback) before assigning siteUrl, affecting all derived URLs such as canonicalUrl.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

Possibly related PRs

• DevLoversTeam/devlovers.net#422: Directly modified the same Promise.all blog-categories loading in layout.tsx, hardcoding an empty array — this PR reintroduces the fetch via the new helper.

Suggested reviewers

• AM1007
• ViktorSvertoka
• LesiaUKR

Poem

🐇 A trailing slash once caused a fright,
the blog fetch crashed and hid from sight.
With dynamic import, wrapped up tight,
an empty array guards the night.
Now URLs are trimmed just right! ✨

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the main homepage fix: guarding blog category loading to prevent crashes.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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