test: add TypeScript compiler validation tests for AdvancedSettingsPanel

[kanishka-2007-tech]

Description

This PR adds a dedicated compile-time test suite for AdvancedSettingsPanel to validate TypeScript typings and schema constraints using Vitest's expectTypeOf.

The new test file ensures that the component's public API remains type-safe and helps prevent regressions when prop definitions or callback signatures change.

Changes Made

Added app/customize/components/AdvancedSettingsPanel.type-compiler.test.ts
Added compile-time validation for all component props
Verified callback parameter and return types
Validated enum-based props (ViewMode, DeltaFormat, Language, Timezone)
Ensured optional dimension props (badgeWidth, badgeHeight) correctly accept number | ''
Added schema constraint assertions using expectTypeOf

Fixes #6867

Pillar

• 📐 Pillar 2 — Geometric SVG Improvement
• 🕐 Pillar 3 — Timezone Logic Optimization

Checklist before requesting a review:

• I have read the CONTRIBUTING.md file.
• I have tested these changes locally (localhost:3000/api/streak?user=YOUR_USERNAME).
• I have run npm run format and npm run lint locally and resolved all errors (CI will fail otherwise).
• My commits follow the Conventional Commits format (e.g., feat(themes): ..., fix(calculate): ...).
• I have updated README.md if I added a new theme or URL parameter.
• I have started the repo.
• I have made sure that i have only one commit to merge in this PR.
• The SVG output matches the CommitPulse "premium quality" aesthetic standard (no raw elements, smooth animations, correct fonts).
• (Recommended) I joined the CommitPulse Discord community for contributor discussions, mentorship, and faster PR support.

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📦 Next.js Bundle Size Report (Gzipped Sizes)

✨ No significant bundle size changes detected.

📊 Summary of Totals

Category	PR Size	Base Size	Difference
Total JS	3917.41 KB	3917.41 KB	0 B
Total CSS	325.86 KB	325.86 KB	0 B