feat: add help version notices and user errors

user_store.py

@@ -42,6 +42,31 @@ def get_tone_of_voice(user_id: int, db_path: str | None = None) -> str:
         return str(row["tone_of_voice"] or "") if row else ""
 
 
+def get_deploy_notice_version(db_path: str | None = None) -> str:
+    with closing(connect(db_path)) as connection, connection:
+        connection.execute(
+            "CREATE TABLE IF NOT EXISTS app_state (key TEXT PRIMARY KEY, value TEXT NOT NULL)"
+        )
+        row = connection.execute(
+            "SELECT value FROM app_state WHERE key = 'deploy_notice_version'"
+        ).fetchone()
+        return str(row["value"]) if row else ""
+
+
+def set_deploy_notice_version(version: str, db_path: str | None = None) -> None:
+    with closing(connect(db_path)) as connection, connection:
+        connection.execute(
+            "CREATE TABLE IF NOT EXISTS app_state (key TEXT PRIMARY KEY, value TEXT NOT NULL)"
+        )
+        connection.execute(
+            """
+            INSERT INTO app_state (key, value) VALUES ('deploy_notice_version', ?)
+            ON CONFLICT(key) DO UPDATE SET value = excluded.value
+            """,
+            (version,),
+        )
+
+
 def save_tone_of_voice(user_id: int, tone_of_voice: str, db_path: str | None = None) -> None:
     tone = tone_of_voice.strip()[:1200]
     with closing(connect(db_path)) as connection, connection: