Add Phase 2 remote browse scaffolding for /Clients

webui/backend/app/db/remote_client_repository.py

@@ -97,6 +97,20 @@ class RemoteClientRepository:
             ).fetchall()
         return [self._to_dict(row) for row in rows]
 
+    def get_client(self, client_id: str) -> dict | None:
+        with self._connection() as conn:
+            row = conn.execute(
+                """
+                SELECT *
+                FROM remote_clients
+                WHERE client_id = ?
+                """,
+                (client_id,),
+            ).fetchone()
+        if row is None:
+            return None
+        return self._to_dict(row)
+
     def _ensure_schema(self) -> None:
         db_path = Path(self._db_path)
         if db_path.parent and str(db_path.parent) not in {"", "."}: