feat: the assistant's talk is kept in the database per user and the model sees a trimmed window of it; clear is a broom; the ball steps aside for the chat and comes back where the chat was

internal/server/db.go

@@ -123,6 +123,11 @@ CREATE TABLE IF NOT EXISTS forward_rules (
 		`ALTER TABLE admins ADD COLUMN pin_hash TEXT NOT NULL DEFAULT ''`,
 		`ALTER TABLE admins ADD COLUMN role TEXT NOT NULL DEFAULT 'admin'`,
 		`ALTER TABLE admins ADD COLUMN pw_locked INTEGER NOT NULL DEFAULT 0`,
+		`CREATE TABLE IF NOT EXISTS ai_messages (
+		    id INTEGER PRIMARY KEY AUTOINCREMENT,
+		    admin_id INTEGER NOT NULL REFERENCES admins(id) ON DELETE CASCADE,
+		    role TEXT NOT NULL, content TEXT NOT NULL, at INTEGER NOT NULL)`,
+		`CREATE INDEX IF NOT EXISTS ai_messages_admin ON ai_messages(admin_id, id)`,
 		`CREATE TABLE IF NOT EXISTS ssh_hosts (
 		    id INTEGER PRIMARY KEY AUTOINCREMENT,
 		    admin_id INTEGER NOT NULL REFERENCES admins(id) ON DELETE CASCADE,