feat: phases 77–80 — navbar view refresh, static background, API tokens, history suggestion chips

Single consolidated commit for four completed, validated phases (77, 78,
79, 80). The pipeline run left all work uncommitted because the harness
commits only with PHASE_COMMIT=1 while child executors are forbidden from
committing; the phases themselves all passed validation and moved to
.agents/phases/complete/.

Phase 77 — navbar view refresh
- router.js dispatches bor:view-refresh on re-show / active re-click /
  popstate (gated on wasMounted; first show and boot exempt)
- History / RAG / Sources / Tuning re-fetch on refresh (admin branch);
  Chat deliberately excluded (stream survival)
- History "Refresh" button (admin-only, in-flight disable + status line)
- New story suite tests/e2e/test_navbar_refresh.py (7 tests)

Phase 78 — static background
- Removed the animated glow layers; static 44px grid over the flat --bg
  canvas; default and reduced-motion renders byte-identical
- Updated background/theme E2E suites; removed bg-glow test pins

Phase 79 — API tokens
- api_tokens model + migration 0012; hash-only token service
- Admin tokens API + Tokens admin view; POST /api/token-auth;
  live-revoking require_user on chat / suggestions / document content
- Frontend token gate with localStorage cache; anonymous E2E suites
  migrated to token login
- New story suite tests/e2e/test_api_tokens.py (9 tests)

Phase 80 — history suggestion chips
- last_questions() endpoint with SEED fallback; startNewChat() refetch
- Seed-semantics docs (config.py, .env.example, README)
- Integration state matrix + E2E suite rewritten to the 4 chip states

Also included: phase-76 report artifacts and the repo restore-test-db
skill (previously untracked), scripts/* ruff fixes from phase 77.

Final gate state (phase 80 final pass, covers everything above):
- uv run pytest --cov=app → 1637 passed, 0 failed, app/ coverage 99%
- uv run ruff check . && uv run pyright → clean, 0 errors
- Per-phase story E2E suites green in isolation

app/core/auth.py

@@ -1,9 +1,10 @@
-"""Single-admin authentication (phase 16; LOCKED A10 revised 2026-08-22).
+"""Authentication (phase 16 single-admin; phase 79 token users).
 
-One admin (the owner), one plaintext password, one signed cookie. The
-mechanism is Starlette's ``SessionMiddleware`` (itsdangerous-signed cookie
-— no server-side store, no new services, no DB tables): the public API
-stays stateless, the cookie is the *only* session state.
+One admin (the owner), one plaintext password; admin-issued access
+tokens (``bor_`` + 32 hex — see :mod:`app.core.tokens`) for handed-out
+users. The mechanism is Starlette's ``SessionMiddleware``
+(itsdangerous-signed cookie — no server-side store, no new services):
+the public API stays stateless, the cookie is the *only* session state.
 
 Contract:
 * ``ensure_admin_configured`` — fail-loud startup gate: the app must name
@@ -11,22 +12,41 @@ Contract:
 * ``check_password`` — constant-time compare; exactly one generic 401
   message (no user enumeration, there is no second user).
 * ``require_admin`` — FastAPI dependency; anonymous callers get 403
-  ``{"detail": "admin only"}`` (used by ``GET /api/docs`` and the whole
-  ``/api/steering`` router).
+  ``{"detail": "admin only"}`` (the admin-only surfaces: ``GET
+  /api/docs``, the whole ``/api/steering`` router, the token admin
+  API, …).
+* ``require_user`` — FastAPI dependency (phase 79); admin OR a live
+  token session passes, everything else gets 401 ``authentication
+  required``. The token path live-checks the ``api_tokens`` row on
+  every request (the PK lookup IS the revocation check) and drops a
+  dead session (row revoked or gone) from the cookie right there.
 * ``sign_in`` / ``sign_out`` — session-dict helpers for the API routes.
+  One session dict carries BOTH roles (an admin browser that also holds
+  a token reports admin); ``sign_out``'s ``session.clear()`` wipes
+  everything — one logout, both roles.
 """
 from __future__ import annotations
 
 import secrets
+import uuid
 from collections.abc import MutableMapping
 from typing import Any
 
-from fastapi import HTTPException, Request
+from fastapi import Depends, HTTPException, Request
+from sqlalchemy import select
+from sqlalchemy.orm import Session
 
 from app.config import Settings
+from app.db import get_db
+from app.models import ApiToken
 
 #: The session key the single admin is stored under.
 ADMIN_SESSION_KEY = "admin"
+#: The session key a token holder is stored under (phase 79).
+USER_SESSION_KEY = "user"
+#: The session key holding the ``api_tokens`` row id of a token session —
+#: ``require_user``'s live check fetches that row on every request.
+USER_TOKEN_ID_KEY = "user_token_id"
 
 
 def ensure_admin_configured(settings: Settings) -> None:
@@ -70,6 +90,51 @@ def require_admin(request: Request) -> None:
         raise HTTPException(status_code=403, detail="admin only")
 
 
+def require_user(request: Request, db: Session = Depends(get_db)) -> None:  # noqa: B008
+    """FastAPI dependency: allow the admin or a LIVE token holder, else 401.
+
+    Guards the app surface (``POST /api/chat``, ``GET /api/suggestions``,
+    ``GET /api/documents/content`` — phase 79: the ONLY anonymous content
+    is the shared chats). The matrix:
+
+    * admin key set → pass, token state irrelevant (an admin browser
+      that also holds a token still passes as admin);
+    * ``user`` key set → the ``api_tokens`` row for ``user_token_id`` is
+      fetched (a PK hit — the live revocation check, no session store):
+      row missing OR ``revoked_at`` set → BOTH user keys are popped from
+      the session (the dead session is dropped NOW — the next
+      ``whoami`` is anonymous) and the request gets 401;
+    * neither key → 401.
+
+    The failure detail is ``authentication required`` on 401 — not 403:
+    there is no higher privilege that would unblock an anonymous caller
+    (phase 79 auth-error semantics), unlike ``require_admin``'s surfaces.
+    """
+    if request.session.get(ADMIN_SESSION_KEY):
+        return
+    if request.session.get(USER_SESSION_KEY):
+        token_id_raw = request.session.get(USER_TOKEN_ID_KEY)
+        token_id: uuid.UUID | None = None
+        if isinstance(token_id_raw, str):
+            try:
+                token_id = uuid.UUID(token_id_raw)
+            except ValueError:
+                token_id = None  # corrupt session — treat as a missing row
+        row = (
+            db.execute(select(ApiToken).where(ApiToken.id == token_id))
+            .scalars()
+            .first()
+            if token_id is not None
+            else None
+        )
+        if row is None or row.revoked_at is not None:
+            request.session.pop(USER_SESSION_KEY, None)
+            request.session.pop(USER_TOKEN_ID_KEY, None)
+            raise HTTPException(status_code=401, detail="authentication required")
+        return
+    raise HTTPException(status_code=401, detail="authentication required")
+
+
 def sign_in(session: MutableMapping[str, Any]) -> None:
     """Mark the (cookie-backed) session as the single admin.