phase: 11_admin_login

**Verified (final pass, phase 11 — all 7 tasks already in `complete/`)**
- Gate from the wire on a restarted dev server: `/system`→`303 /login?next=/system` (`/llm?range=1h`→`/login?next=/llm%3Frange%3D1h`), `/api/summary`+`/api/config`→`401 {"ok":false,…}`, `/api/health`→`200`; signed-in `GET` of all six pages `200`, `/login`→`303 /`.
- Auth flows on a throwaway server (`:8199`, `/tmp` DB — dev `auth.verifier` untouched): wrong pw `401`, `testpass` `200`, password change `200`, **old cookie `401` / new cookie `200`**, old pw `401` / new pw `200`, short new `422`, wrong current `403`, cookie write without CSRF `403`, logout `200`; 5 failures then `429 retry-after: 60`; `login-denied`/`password-changed`/`password-denied` events; `meta` = the two auth keys.
- Fail-closed boot (no seed, empty DB): **exit 3**, message names `DASH_ADMIN_PASSWORD`, `auth.verifier`, and the `DELETE FROM meta …` reset. `dev-server.sh status` + the Containerfile `HEALTHCHECK` python one-liner both `200`/exit 0 unauthenticated.
- Live payloads unchanged (phases 01–10 walk): `/api/summary` keys + 8 alerts + hosts 3/2 live; UPS `simulated:false` with charge/load/runtime severity; deskwork `nvme0n1` 51 °C/19 159 h/11 % wear; gateway `smartctl_available:false`; driveripper `unreachable` stub.

**Tests/lint (all green)**: `bash .agents/validate.sh` → exit 0 — `1140 passed, 11 skipped`, coverage `98.62%` (floor 94), ruff `All checks passed!`, pyright `0 errors`, `node --check` clean, repo hygiene clean. `uv run pytest -m live --live` → `8 passed, 3 failed`, all `driveripper: 10.1.0.126:9120 … ConnectError` (pre-existing, auth-free; probe confirms nothing listening).

**Completion criteria**: all met except the live-suite caveat above — installing the driveripper agent needs root on that host (no `ops` grant), so per the live-infra rule I made **no live change**; task 07's five screenshots (`auth-login/-rejected/-locked-out/-signed-in-overview/-settings.png`) remain the browser evidence, and the login/rotation/lockout flows were re-proved over HTTP this pass.

**Docs**: README — fixed "only place the CSRF token is published" (login/password responses mint one), added the undocumented `DASH_RELOAD` row, stated that Sign out ends only this browser's cookie. `AGENTS.md` — new known gap 8 (stateless logout cannot revoke a copied token), gap-4 dev-store sizes dated, fleet section notes `data/` is gitignored. `api.py` — same `status` docstring imprecision fixed. Verified the 4 `DASH_*` rows, reset command, seed-wins rule and invariant 12 against `app.py`/`config.py`.

**Deviations**: no dependency bump (`uv pip list --outdated` advisory: certifi/fastapi/starlette — phase added none); verification notes appended to `data/logs/NOTES-auth.md` §10.

**Next pending phase**: `12_nut_self_test_verdict`.

tests/test_system_contract.py

@@ -36,6 +36,8 @@ from typing import Any
 import pytest
 from fastapi.testclient import TestClient
 
+from auth_client import sign_in
+from auth_contract import ADMIN_PASSWORD, FAST_PBKDF2
 from card_contract import GPU_METRICS, HOST_SHAPES, assert_card_contract, dig
 from dashboards.app import create_app
 from dashboards.config import Settings, Target
@@ -91,11 +93,16 @@ def api_client(tmp_path: Any, agent_snapshot: dict[str, Any],
     """A running app serving one host payload, so the contract is checked over HTTP too."""
     db = str(tmp_path / "contract.sqlite3")
     store = SampleStore(db)
-    app = create_app(Settings(db_path=db, host_targets=(Target("driveripper", DEAD_URL),)),
-                     store)
+    app = create_app(Settings(db_path=db, admin_password=ADMIN_PASSWORD,
+                              pbkdf2_iterations=FAST_PBKDF2,
+                              host_targets=(Target("driveripper", DEAD_URL),)), store)
     client = TestClient(app)
     client.__enter__()
     try:
+        # phase 11: the snapshot is behind the session, and `TestClient` follows the 303 to
+        # /login — a contract checked against the login page would pass on every path check
+        # below it, which is worse than the test failing.
+        sign_in(client)
         # the job's port refuses, so a poll can never overwrite what is injected here
         app.state.ctx.hub.jobs["host:driveripper"].state.payload = host_scrape(
             agent_snapshot, cpu_busy=10.0)