fix(spawn): strip ANSI codes from zellij list-sessions output

Zellij outputs colored text with ANSI escape codes, which caused
session name parsing to fail. Now strips escape codes before parsing.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

dashboard/components/SpawnModal.js

@@ -75,12 +75,15 @@ export function SpawnModal({ isOpen, onClose, onSpawn, currentProject }) {
   }, [isOpen, handleClose]);
 
   const handleSpawn = async () => {
-    const project = currentProject || selectedProject;
-    if (!project) {
+    const rawProject = currentProject || selectedProject;
+    if (!rawProject) {
       setError('Please select a project');
       return;
     }
 
+    // Extract project name from full path (sidebar passes projectDir like "/Users/.../projects/amc")
+    const project = rawProject.includes('/') ? rawProject.split('/').pop() : rawProject;
+
     setLoading(true);
     setError(null);
 
@@ -169,7 +172,7 @@ export function SpawnModal({ isOpen, onClose, onSpawn, currentProject }) {
             <div class="flex flex-col gap-1.5">
               <label class="text-label font-medium text-dim">Project</label>
               <div class="rounded-xl border border-selection/75 bg-bg/70 px-3 py-2 text-sm text-bright">
-                ${currentProject}
+                ${currentProject.includes('/') ? currentProject.split('/').pop() : currentProject}
               </div>
             </div>
           `}