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/resume.go

@@ -46,8 +46,8 @@ func doResume(query string, container, useShell, force bool, agentOverride strin
 		return nil
 	}
 
-	root := config.ResolveRoot()
-	ws := resolveOne(root, query, false)
+	roots := config.SearchRoots()
+	ws := resolveOne(roots, query, false)
 
 	// Update updated_at
 	now := time.Now().UTC().Truncate(time.Second)
@@ -62,7 +62,7 @@ func doResume(query string, container, useShell, force bool, agentOverride strin
 		agent = ws.Meta.Agent
 	}
 
-	envVars := config.EnvVars(ws.Meta.Slug, ws.Meta.Mode, root, ws.Path, ws.Meta.Category, workspace.EffectiveType(ws.Meta))
+	envVars := config.EnvVars(ws.Meta.Slug, ws.Meta.Mode, ws.Root, ws.Path, ws.Meta.Category, workspace.EffectiveType(ws.Meta))
 
 	return session.Run(session.LaunchOpts{
 		WsDir:   ws.Path,