Remove unused maxResults parameter from search endpoint

Self-review finding: the maxResults query parameter was accepted by the
controller but not meaningfully forwarded (service uses internal caps).
Removed to avoid misleading API surface.

Author: Chris0Jeky

backend/src/Taskdeck.Api/Controllers/SearchController.cs

@@ -21,13 +21,12 @@ public SearchController(ISearchService searchService, IUserContext userContext)
     [HttpGet]
     public async Task<IActionResult> Search(
         [FromQuery] string? q,
-        [FromQuery] int maxResults = 20,
         CancellationToken cancellationToken = default)
     {
         if (!TryGetCurrentUserId(out var userId, out var errorResult))
             return errorResult!;
 
-        var result = await _searchService.SearchAsync(userId, q ?? string.Empty, maxResults, cancellationToken);
+        var result = await _searchService.SearchAsync(userId, q ?? string.Empty, cancellationToken: cancellationToken);
         return result.IsSuccess ? Ok(result.Value) : result.ToErrorActionResult();
     }
 }

frontend/taskdeck-web/src/api/searchApi.ts

@@ -23,10 +23,9 @@ export interface GlobalSearchResult {
 }
 
 export const searchApi = {
-  async search(query: string, maxResults = 20): Promise<GlobalSearchResult> {
+  async search(query: string): Promise<GlobalSearchResult> {
     const params = new URLSearchParams()
     params.append('q', query)
-    if (maxResults !== 20) params.append('maxResults', String(maxResults))
     const { data } = await http.get<GlobalSearchResult>(`/search?${params}`)
     return data
   },