feat: add remove button to each worktree in sidebar list

Show an × button on hover for non-main worktrees. Replace the
boolean showConfirmRemove with a removeBranch string so the
confirm dialog works from both sidebar and top bar.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

dev-dashboard/frontend/src/App.svelte

@@ -16,7 +16,7 @@
 
   let worktrees = $state<WorktreeInfo[]>([]);
   let selectedBranch = $state<string | null>(null);
-  let showConfirmRemove = $state(false);
+  let removeBranch = $state<string | null>(null);
   let showCreateDialog = $state(false);
   let creating = $state(false);
   let removing = $state(false);
@@ -63,12 +63,12 @@
   }
 
   async function handleRemove() {
-    if (!selectedBranch) return;
+    if (!removeBranch) return;
     removing = true;
     try {
-      await api.removeWorktree(selectedBranch);
-      showConfirmRemove = false;
-      selectedBranch = null;
+      await api.removeWorktree(removeBranch);
+      if (selectedBranch === removeBranch) selectedBranch = null;
+      removeBranch = null;
       await refresh();
     } catch (err) {
       alert(`Failed to remove: ${err instanceof Error ? err.message : err}`);
@@ -95,14 +95,14 @@
         title="New Worktree"
       ><span class="text-lg leading-none">+</span> New</button>
     </div>
-    <WorktreeList worktrees={visibleWorktrees} selected={selectedBranch} onselect={(b) => (selectedBranch = b)} />
+    <WorktreeList worktrees={visibleWorktrees} selected={selectedBranch} onselect={(b) => (selectedBranch = b)} onremove={(b) => (removeBranch = b)} />
   </aside>
 
   <main class="flex-1 min-w-0 flex flex-col overflow-hidden">
     <TopBar
       name={selectedBranch}
       worktree={selectedWorktree}
-      onremove={() => (showConfirmRemove = true)}
+      onremove={() => { if (selectedBranch) removeBranch = selectedBranch; }}
     />
 
     {#if canConnect}
@@ -161,11 +161,11 @@
   <div class="fixed inset-0 bg-black/50 z-40" onclick={() => (showCreateDialog = false)}></div>
 {/if}
 
-{#if showConfirmRemove}
+{#if removeBranch}
   <ConfirmDialog
-    message={`Remove worktree "${selectedBranch}"? This action cannot be undone.`}
+    message={`Remove worktree "${removeBranch}"? This action cannot be undone.`}
     loading={removing}
     onconfirm={handleRemove}
-    oncancel={() => (showConfirmRemove = false)}
+    oncancel={() => (removeBranch = null)}
   />
 {/if}

dev-dashboard/frontend/src/lib/WorktreeList.svelte

@@ -1,10 +1,11 @@
 <script lang="ts">
   import type { WorktreeInfo } from "./types";
 
-  let { worktrees, selected, onselect }: {
+  let { worktrees, selected, onselect, onremove }: {
     worktrees: WorktreeInfo[];
     selected: string | null;
     onselect: (branch: string) => void;
+    onremove: (branch: string) => void;
   } = $props();
 
   function dotColor(agent: string): string {
@@ -19,13 +20,13 @@
   {#each worktrees as wt (wt.branch)}
     {@const isMain = wt.path === "(here)" || wt.branch === "main"}
     {@const isActive = wt.branch === selected}
-    <li class="mb-0.5">
+    <li class="mb-0.5 group relative">
       <button
         type="button"
         class="w-full py-2.5 px-3 rounded-md border cursor-pointer flex flex-col gap-1 text-left text-inherit text-sm bg-transparent hover:bg-hover {isActive ? 'bg-active border-accent' : 'border-transparent'}"
         onclick={() => onselect(wt.branch)}
       >
-        <span class="font-medium truncate">{wt.branch}</span>
+        <span class="font-medium truncate pr-5">{wt.branch}</span>
         <span class="flex gap-2 text-[11px] text-muted">
           <span><span class="inline-block w-2 h-2 rounded-full mr-1 align-middle {dotColor(wt.agent)}"></span>{wt.agent || "none"}</span>
           {#if wt.mux && wt.mux !== "-"}
@@ -36,6 +37,14 @@
           {/if}
         </span>
       </button>
+      {#if !isMain}
+        <button
+          type="button"
+          class="absolute top-2 right-2 w-5 h-5 rounded flex items-center justify-center text-muted hover:text-danger hover:bg-hover opacity-0 group-hover:opacity-100 transition-opacity cursor-pointer"
+          title="Remove worktree"
+          onclick={(e) => { e.stopPropagation(); onremove(wt.branch); }}
+        >&times;</button>
+      {/if}
     </li>
   {/each}
 </ul>