fix(daemon): remove dead code and improve UX feedback

Remove unused ListWorkspaces/Workspace from daemon client, add log when
default workspace is set implicitly, document token reload limitation.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

server/cmd/multica/cmd_workspace.go

@@ -123,6 +123,7 @@ func runWatch(cmd *cobra.Command, args []string) error {
 
 	if cfg.WorkspaceID == "" {
 		cfg.WorkspaceID = ws.ID
+		fmt.Fprintf(os.Stderr, "Set default workspace to %s (%s)\n", ws.ID, ws.Name)
 	}
 
 	if err := cli.SaveCLIConfig(cfg); err != nil {

server/internal/daemon/client.go

@@ -36,12 +36,6 @@ func isWorkspaceNotFoundError(err error) bool {
 	return strings.Contains(strings.ToLower(reqErr.Body), "workspace not found")
 }
 
-// Workspace represents a workspace from the API.
-type Workspace struct {
-	ID   string `json:"id"`
-	Name string `json:"name"`
-}
-
 // Client handles HTTP communication with the Multica server daemon API.
 type Client struct {
 	baseURL string
@@ -62,15 +56,6 @@ func (c *Client) SetToken(token string) {
 	c.token = token
 }
 
-// ListWorkspaces fetches the user's workspaces using the auth token.
-func (c *Client) ListWorkspaces(ctx context.Context) ([]Workspace, error) {
-	var ws []Workspace
-	if err := c.getJSON(ctx, "/api/workspaces", &ws); err != nil {
-		return nil, err
-	}
-	return ws, nil
-}
-
 func (c *Client) ClaimTask(ctx context.Context, runtimeID string) (*Task, error) {
 	var resp struct {
 		Task *Task `json:"task"`

server/internal/daemon/daemon.go

@@ -204,6 +204,8 @@ func (d *Daemon) configWatchLoop(ctx context.Context) {
 }
 
 // reloadWorkspaces reconciles the active workspace set with the config file.
+// NOTE: Token changes (e.g. re-login as a different user) are not picked up;
+// the daemon must be restarted for a new auth token to take effect.
 func (d *Daemon) reloadWorkspaces(ctx context.Context) {
 	d.reloading.Lock()
 	defer d.reloading.Unlock()