fix(pam): cap the access requests search width and move its filters onto bit-filter-menu

[maxkpower]

Design review 2026-09-04: the search field is too wide, and bit-filter-menu is wanted everywhere bit-chip-filter is used.

bit-search sets no host display class, so as a block child it is an inline box and max-width does not apply; the cap only works once it is a flex item. After this, no bit-chip-filter remains under app/pam/.

[codecov]

Codecov Report

❌ Patch coverage is 78.57143% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 56.05%. Comparing base (e7321e3) to head (791e6cd).
⚠️ Report is 288 commits behind head on pam/uat.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
...ense/bit-web/src/app/pam/testing/story-fixtures.ts	0.00%	2 Missing ⚠️
...p/pam/access-requests/my-requests-tab.component.ts	75.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           pam/uat   #23003      +/-   ##
===========================================
+ Coverage    55.74%   56.05%   +0.30%     
===========================================
  Files         4438     4467      +29     
  Lines       141404   143051    +1647     
  Branches     22371    22594     +223     
===========================================
+ Hits         78824    80182    +1358     
- Misses       56914    57118     +204     
- Partials      5666     5751      +85     

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