phase: 175_history_pagination

All criteria verified. This pass found no defects — the phase was fully implemented by prior task runs, and every gate is green.

**Phase 175 final verification pass — report**

- Verified tasks 01–03 implementation in-tree: `list_chats` `?limit=` (25, 1–100) / `?offset=` + `func.count` `total`; `SavedChatList.total` required; `#history-pager` below `#history-table-wrap` (hidden default, aria-labels, aria-hidden SVGs); `history.js` `PAGE_SIZE=25`/offset state, parameterized fetch, `updatePager`, refresh-keeps-current-page; CSS pill union + ≤640px block. No code changes were needed.
- Full suite: `uv run pytest --cov=app --cov-report=term-missing` → **exit 0, TOTAL 99%** (>90% gate).
- `uv run ruff check .` → all checks passed; `uv run pyright` → 0 errors, 0 warnings.
- Phase E2E in isolation: `uv run pytest tests/e2e/test_history_pagination.py -v --no-cov` → **9 passed** (page 1-of-2 / 2-of-2 walk, replace-not-append, refresh-on-page-2, delete-to-empty + single-page hide, anonymous no-fetch, 375px mobile, a11y/no-CDN).
- Regression set, each in isolation: test_chat_history 5✓, test_history_page_width 5✓, test_share_chat 4✓, test_stale_saved_chats 3✓, test_history_copy 1✓; integration `test_chats_api.py` green (incl. updated `test_list_empty` two-key pin and all five new pagination pins).
- Completion criteria: all nine boxes satisfied (API slice/422/honest-total pins ✓; E2E walk + status lines ✓; refresh/delete/hide ✓; anonymous gate ✓; mobile ✓; gates ✓; E2E + regression ✓; docs ✓; commit/phase-move is the harness's).
- Documentation: README.md reviewed in full — the saved-chats section already carries the `?limit=`/`?offset=`/`total` contract from this phase; all 31 `.env.example` vars documented; AGENTS.md verified accurate. **Consistent — no changes needed.**
- Deviations: none. No defects found in previously completed work.
- Next pending phase: none — 175 is the only entry in `todo/`.

frontend/index.html

@@ -1061,6 +1061,26 @@
             </tbody>
           </table>
         </div>
+        <!-- Phase 175 (TODO.md L3): the list pager — visible only when
+             there is more than one page (total > the 25-row page size —
+             history.js toggles `hidden`), so a one-page list never shows a
+             dead control. The buttons reuse the .history-refresh pill
+             language (the house inline-SVG glyph + visible label +
+             aria-label; the ≤640px full-width block joins
+             .history-refresh). #history-pager-status carries "Page N of M";
+             page-change outcome lines land in #history-status (the existing
+             live region). -->
+        <div class="history-pager" id="history-pager" hidden>
+          <button type="button" class="history-pager-btn" id="history-pager-prev" aria-label="Previous page of saved chats">
+            <svg class="history-pager-icon" aria-hidden="true" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.7" stroke-linecap="round" stroke-linejoin="round"><path d="M15 18l-6-6 6-6"/></svg>
+            <span class="history-pager-label">Prev</span>
+          </button>
+          <span class="history-pager-status" id="history-pager-status"></span>
+          <button type="button" class="history-pager-btn" id="history-pager-next" aria-label="Next page of saved chats">
+            <span class="history-pager-label">Next</span>
+            <svg class="history-pager-icon" aria-hidden="true" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.7" stroke-linecap="round" stroke-linejoin="round"><path d="M9 18l6-6-6-6"/></svg>
+          </button>
+        </div>
       </div>
     </section>