Throttle + debounce

[ManishMadan2882]

• What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)
  migrated the fetch direct calls in the frontend to use the apiClient, then added a throttledApiClient

  • apiClient (default export) --> raw fetch, no concurrency control, no dedupe.
  • throttledApiClient (named export) --> fetch wrapped by withThrottle(...) from api/throttle.ts, i.e. global cap (8), per-route cap (3), and in-flight GET deduplication.

  Defaults for the throttle middleware (maxConcurrentGlobal=8, maxConcurrentPerRoute=3, dedupe=true for GET) are configurable via withThrottle(...) in api/client.ts if they need tuning later.
  Dedupe is intentionally GET-only and keyed by method + pathname; mutating verbs are never coalesced.
  Aborting a request removes it from the per-route queue and rejects with a standard AbortError, matching native fetch semantics - existing callers that rely on AbortController continue to work unchanged.

  added the useDebouncedValue and useDebouncedCallback hooks
  useDebouncedValue - debounces a value. You give it state, it gives you a delayed copy of that state.
  useDebouncedCallback - debounces a function call. give it a function, it gives you a wrapped version that delays its invocation.

• Why was this change needed? (You can also link to an open issue here)
  Add throttling to frontend api calls #162

• Other information:

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.16%. Comparing base (9b8fe2d) to head (0bcc2be).
⚠️ Report is 27 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2458      +/-   ##
==========================================
- Coverage   91.34%   91.16%   -0.19%     
==========================================
  Files         248      255       +7     
  Lines       20709    21675     +966     
==========================================
+ Hits        18916    19759     +843     
- Misses       1793     1916     +123     

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Project	Deployment	Actions	Updated (UTC)
oss-docsgpt	Ready	Preview, Comment	May 8, 2026 0:12am