fix(v0.4.1): route all workspace commands through SearchRoots

Every resolver, lister, and most-recent caller now passes
config.SearchRoots() so CTASK_PROJECT_ROOT is searched alongside
CTASK_ROOT. Commands use ws.Root when rendering relative paths or
session env vars so displays and CTASK_ROOT exports are correct for
workspaces living under CTASK_PROJECT_ROOT.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

cmd/delete.go

@@ -32,8 +32,8 @@ func init() {
 }
 
 func runDelete(cmd *cobra.Command, args []string) error {
-	root := config.ResolveRoot()
-	ws := resolveOne(root, args[0], deleteAll)
+	roots := config.SearchRoots()
+	ws := resolveOne(roots, args[0], deleteAll)
 
 	// Active workspace protection — two checks, BOTH run before any mutation.
 	//
@@ -61,7 +61,7 @@ func runDelete(cmd *cobra.Command, args []string) error {
 
 	// --- Past this point, we are confident no session is active. ---
 
-	relPath := workspace.RelativePath(root, ws.Path)
+	relPath := workspace.RelativePath(ws.Root, ws.Path)
 
 	// Gather contents summary (best-effort, read-only)
 	fileCount, totalSize := summarizeContents(ws.Path)
@@ -72,7 +72,7 @@ func runDelete(cmd *cobra.Command, args []string) error {
 
 	// Check if this is the most recently updated workspace across both
 	// tasks and projects.
-	if best, _ := workspace.MostRecentActive(root); best != nil {
+	if best, _ := workspace.MostRecentActive(roots); best != nil {
 		absBest, _ := filepath.Abs(best.Path)
 		if strings.EqualFold(absTarget, absBest) {
 			fmt.Println()