Improve user search and profile components #287
Description
Improvements from PR #286 review feedback
The following suggestions from Copilot code review are worth addressing in a future iteration:
1. Extract shared utility functions (DRY)
File: user-profile.component.ts, profile.component.ts
formatDisplayName() and formatMemberSince() are duplicated across ProfileComponent and UserProfileComponent. Extract these into a shared utility or service.
2. Case-insensitive search
File: user-search.service.ts
Search is currently case-sensitive (Firestore prefix search limitation). Consider storing a lowercase displayNameLower field on user documents and querying against that for case-insensitive matching.
3. Smarter back navigation
File: user-profile.component.ts
goBack() always navigates to /search. Consider using Location.back() with a fallback to /search when there's no navigation history (e.g. direct link).
From Copilot review on PR #286