feat: error banners and first-run navigation flow

tests/test_chat_list.py

@@ -20,11 +20,29 @@ def client(tmp_path, monkeypatch):
         yield c
 
 
-def _author_bot_and_chat(db_path: Path, bot_id: str = "bot_a") -> None:
-    """Insert a bot and a chat directly via the event log (skip kickoff route)."""
+def _author_you(db_path: Path) -> None:
+    """Author a ``you_entity`` so the first-run middleware doesn't redirect."""
     from chat.db.connection import open_db
 
     with open_db(db_path) as conn:
+        append_event(
+            conn,
+            kind="you_authored",
+            payload={"name": "Me", "pronouns": "", "persona": ""},
+        )
+        project(conn)
+
+
+def _author_bot_and_chat(db_path: Path, bot_id: str = "bot_a") -> None:
+    """Insert a you_entity, bot, and chat via the event log (skip kickoff route)."""
+    from chat.db.connection import open_db
+
+    with open_db(db_path) as conn:
+        append_event(
+            conn,
+            kind="you_authored",
+            payload={"name": "Me", "pronouns": "", "persona": ""},
+        )
         append_event(
             conn,
             kind="bot_authored",
@@ -53,13 +71,26 @@ def _author_bot_and_chat(db_path: Path, bot_id: str = "bot_a") -> None:
         project(conn)
 
 
-def test_root_redirects_to_chats(client):
+def test_root_redirects_to_chats_when_setup_complete(client, tmp_path):
+    # With both you_entity and a bot present, the first-run middleware
+    # passes through and the nav router sends "/" → "/chats".
+    _author_bot_and_chat(tmp_path / "test.db", "bot_a")
     response = client.get("/", follow_redirects=False)
     assert response.status_code == 303
     assert response.headers["location"] == "/chats"
 
 
-def test_chats_list_empty_state(client):
+def test_chats_list_empty_state(client, tmp_path):
+    # Author you + a bot but NO chats — should render the empty-state
+    # chats list, not redirect.
+    _author_bot_and_chat(tmp_path / "test.db", "bot_a")
+    # Drop the chat row so we hit the empty-state branch (the helper
+    # creates a chat — undo it via a fresh seed without chat_created).
+    from chat.db.connection import open_db
+
+    with open_db(tmp_path / "test.db") as conn:
+        conn.execute("DELETE FROM chats")
+        conn.commit()
     response = client.get("/chats")
     assert response.status_code == 200
     body = response.text.lower()