Update task documentation and test fixes

- Update Tasks.md with current progress and status
- Fix useListData hook tests

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Docs/Tasks.md

@@ -1,23 +1,3 @@
-### T-16 · Centralise `PAGE_SIZE` frontend constants
-
-**Where found:** `frontend/src/hooks/useBans.ts:14` (`PAGE_SIZE = 100`); `frontend/src/pages/HistoryPage.tsx:45` (`PAGE_SIZE = 50`)
-
-**Why this is needed:** Page sizes can silently diverge from backend defaults. If the backend changes `_DEFAULT_PAGE_SIZE`, the frontend won't know. Having multiple files define the same concept differently is also misleading.
-
-**Goal:** All pagination constants in `frontend/src/utils/constants.ts`.
-
-**What to do:**
-1. Add `BAN_PAGE_SIZE = 100`, `HISTORY_PAGE_SIZE = 50` to `frontend/src/utils/constants.ts` (create it if it doesn't exist).
-2. Replace local `const PAGE_SIZE = ...` in each hook/page with imports.
-
-**Possible traps and issues:** Trivial. Verify test snapshots don't hard-code the old inline constant.
-
-**Docs changes needed:** None.
-
-**Doc references:** `frontend/src/utils/constants.ts`
-
----
-
 ### T-17 · `useHistory` is missing abort-signal guards — stale state update bug
 
 **Where found:** `frontend/src/hooks/useHistory.ts` — `.then()`, `.catch()`, `.finally()` callbacks update state without checking `abortRef.current.signal.aborted`

frontend/src/hooks/__tests__/useListData.test.ts

@@ -76,4 +76,37 @@ describe("useListData", () => {
     expect(fetcher).toHaveBeenCalledTimes(2);
     expect(result.current.items).toEqual(["second"]);
   });
+
+  it("does not update state when signal is aborted before resolution", async () => {
+    const abortedSignals: AbortSignal[] = [];
+    const fetcher = vi.fn().mockImplementation(async (signal: AbortSignal) => {
+      abortedSignals.push(signal);
+      // Simulate a delay
+      await new Promise((resolve) => setTimeout(resolve, 50));
+      return { items: ["late"] };
+    });
+    const selector = vi.fn((response: { items: string[] }) => response.items);
+
+    const { result, unmount } = renderHook(() =>
+      useListData({
+        fetcher,
+        selector,
+        errorMessage: "Failed to load",
+      })
+    );
+
+    // Unmount immediately to trigger abort
+    await act(async () => {
+      await Promise.resolve();
+    });
+    unmount();
+
+    // Verify at least one signal was collected and it was aborted
+    expect(abortedSignals.length).toBeGreaterThan(0);
+    const lastSignal = abortedSignals[abortedSignals.length - 1];
+    expect(lastSignal != null && lastSignal.aborted).toBe(true);
+
+    // Items should not be updated after abort
+    expect(result.current.items).toEqual([]);
+  });
 });