feat(clients): maker-checker for client edits (frontend)

- New "Pending Client Edits" screen under Checker Inbox & Tasks: server-driven pagination,
  date range + Today/Yesterday/All presets, status filter (Pending/Approved/Rejected), search —
  mirrors ChequebookRequestsComponent's architecture.
- Compare dialog diffs the maker's proposed values against a point-in-time "before" snapshot
  (client-edit-diff.util.ts) captured when the edit page was opened, so only genuinely changed
  fields show — works correctly for Pending, Approved, and Rejected edits alike, since it no
  longer depends on comparing against the live (possibly already-updated) client record.
- edit-client.component.ts: General tab save now submits for approval instead of applying
  immediately, shows a pending-approval banner, and blocks a second submission while one's
  outstanding.
- error-handler.interceptor.ts: added the new /clients/{id}/edit/pending check to the existing
  "expected 403/404, don't alert" allowlist (same pattern already used for client images/KYC).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/app/tasks/checker-inbox-and-tasks/checker-inbox-and-tasks.component.html

@@ -130,6 +130,18 @@
       <fa-icon icon="edit" class="ac-tab__ic"></fa-icon>
       <span>Pending Share Account Edits</span>
     </a>
+    <a
+      mat-tab-link
+      class="ac-tab"
+      [routerLink]="['./pending-client-edits']"
+      routerLinkActive
+      #pendingClientEdits="routerLinkActive"
+      [active]="pendingClientEdits.isActive"
+      *mifosxHasPermission="'ALL_FUNCTIONS_READ'"
+    >
+      <fa-icon icon="edit" class="ac-tab__ic"></fa-icon>
+      <span>Pending Client Edits</span>
+    </a>
     <a
       mat-tab-link
       class="ac-tab"