fix(cli): ensure cloud URLs are configured when not using local mode

After installing via `curl | bash` (default/cloud mode) or running
`multica setup` without a local server, the CLI config could retain
stale localhost URLs from a previous `multica config local` or
`--local` install. This caused `multica login` to connect to
localhost instead of multica.ai.

Fix: explicitly write cloud URLs (api.multica.ai / multica.ai) to
the config in both the install script's cloud mode and the setup
command's cloud fallback path.

scripts/install.sh

@@ -241,6 +241,16 @@ configure_local() {
   ok "CLI configured for localhost (backend :8080, frontend :3000)"
 }
 
+# ---------------------------------------------------------------------------
+# Configure CLI for Multica Cloud
+# ---------------------------------------------------------------------------
+configure_cloud() {
+  info "Configuring CLI for Multica Cloud..."
+  multica config set server_url https://api.multica.ai 2>/dev/null || true
+  multica config set app_url https://multica.ai 2>/dev/null || true
+  ok "CLI configured for multica.ai"
+}
+
 # ---------------------------------------------------------------------------
 # Main: Default mode (cloud — install CLI to connect to multica.ai)
 # ---------------------------------------------------------------------------
@@ -252,6 +262,7 @@ run_default() {
 
   detect_os
   install_cli
+  configure_cloud
 
   printf "\n"
   printf "${BOLD}${GREEN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${RESET}\n"

server/cmd/multica/cmd_setup.go

@@ -55,6 +55,13 @@ func runSetup(cmd *cobra.Command, args []string) error {
 		fmt.Fprintf(os.Stderr, "  server_url: %s\n", cfg.ServerURL)
 	} else if !forceLocal {
 		fmt.Fprintln(os.Stderr, "No local server detected — using Multica Cloud (https://multica.ai).")
+
+		cfg, _ := cli.LoadCLIConfigForProfile(profile)
+		cfg.AppURL = "https://multica.ai"
+		cfg.ServerURL = "https://api.multica.ai"
+		if err := cli.SaveCLIConfigForProfile(cfg, profile); err != nil {
+			return fmt.Errorf("save config: %w", err)
+		}
 	}
 
 	// Authenticate.