feat: show section-specific titles for 8803

[Oliver-Zen]

Summary

Resolves #382

This PR makes the following 4 places show correct section title as course name for 8803 special topics courses:

1. SectionBlocks
2. CompareBlocks
3. Map list
4. Calendar export text

Note: Merge Order

Merge this PR after the corresponding backend PR.
This PR includes a fallback, so merging out of order won’t break builds, but this order is preferred.

Checklist

• fix: Special Topics courses show incorrect titles

How to Test

yarn start

1. SectionBlocks

2. CompareBlocks

3. Map list

4. Calendar export text

[github-actions]

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[Oliver-Zen]

3 Major Changes

1. No more hard coding 8803 checking: isMultipleTopics is computed once when the course bean is built, so every component (SectionBlocks, CompareBlocks, Map, Calendar export) can reuse the same answer without re-scanning the sections list.
2. Course / Section title fetching logic is encapsulated and put into utils/misc.tsx
3. Fixed map ALL day ActionRow's issue, now it shows all unique sections' titles if user registers more than one multi-topic section, instead of the first section's title

Tests

• "Multiple Topics" shown as course title
• Each section block has its own course name
• Same for CompareBlocks
• Calendar export text shows section specific names

• Each special topic section has its own entry in ALL day ActionRow

[Oliver-Zen]

Updated frontend code based on the code changes of crawler.