diff --git a/vscode/package.json b/vscode/package.json
index 6f606e9..62a0601 100644
--- a/vscode/package.json
+++ b/vscode/package.json
@@ -2,7 +2,7 @@
   "publisher": "clurdra",
   "name": "superpowers-vscode-clurdra",
   "displayName": "Superpowers-clurdra",
-  "version": "0.2.97",
+  "version": "0.2.98",
   "packageManager": "pnpm@10.27.0",
   "description": "Superpowers specs and plans Kanban explorer",
   "author": "clurdra",
diff --git a/vscode/webview-ui/src/components/ManagedSessionsPanel.tsx b/vscode/webview-ui/src/components/ManagedSessionsPanel.tsx
index a246a7d..79ead17 100644
--- a/vscode/webview-ui/src/components/ManagedSessionsPanel.tsx
+++ b/vscode/webview-ui/src/components/ManagedSessionsPanel.tsx
@@ -145,15 +145,16 @@ export function ManagedSessionsPanel({
         <div className="flex flex-col gap-2">
           <div className="flex items-center gap-2">
             <span className="w-12 shrink-0 text-xs text-[var(--vscode-descriptionForeground)]">Profile</span>
-            <SelectMenu
-              value={selectedProfile}
-              onChange={setSelectedProfile}
-              options={profiles.length === 0
-                ? [{ value: '', label: '（无可用 profile）' }]
-                : profiles.map(p => ({ value: p.path, label: p.name }))}
-              variant="input"
-              className="min-w-0 flex-1"
-            />
+            <div className="min-w-0 flex-1">
+              <SelectMenu
+                value={selectedProfile}
+                onChange={setSelectedProfile}
+                options={profiles.length === 0
+                  ? [{ value: '', label: '（无可用 profile）' }]
+                  : profiles.map(p => ({ value: p.path, label: p.name }))}
+                variant="input"
+              />
+            </div>
           </div>
           <div className="flex items-center gap-2">
             <span className="w-12 shrink-0 text-xs text-[var(--vscode-descriptionForeground)]">名字</span>
diff --git a/vscode/webview-ui/src/components/ui/select-menu.tsx b/vscode/webview-ui/src/components/ui/select-menu.tsx
index 128e6f8..8d981f3 100644
--- a/vscode/webview-ui/src/components/ui/select-menu.tsx
+++ b/vscode/webview-ui/src/components/ui/select-menu.tsx
@@ -22,6 +22,25 @@ export interface SelectMenuProps {
 }
 
 const MAX_MENU_HEIGHT = 240
+/** 勾选图标 + gap + 水平 padding + 竖滚动条槽。少算会把最后几个字挤成省略号。 */
+const MENU_CHROME_PX = 14 + 6 + 16 + 12
+
+function measureOptionsWidth(options: SelectMenuOption[], font: string): number {
+  const probe = document.createElement('span')
+  probe.style.cssText = `position:absolute;left:-9999px;top:0;white-space:nowrap;font:${font}`
+  document.body.appendChild(probe)
+  let max = 0
+  for (const o of options) {
+    probe.textContent = o.label
+    max = Math.max(max, probe.offsetWidth)
+    if (o.hint) {
+      probe.textContent = o.hint
+      max = Math.max(max, probe.offsetWidth)
+    }
+  }
+  probe.remove()
+  return max
+}
 
 /**
  * 自定义下拉组件，替代原生 select。
@@ -57,12 +76,21 @@ export function SelectMenu({
     const spaceBelow = window.innerHeight - rect.bottom
     const spaceAbove = rect.top
     const openUp = spaceBelow < menuHeight && spaceAbove > spaceBelow
+    // 跟触发器同宽会把长 profile 名截成省略号（ghost / 未撑满的 button 尤其明显）。
+    // 按最长项测量，下限触发器宽、上限视口，溢出时左移，不超出 webview。
+    const gutter = 8
+    const contentW = measureOptionsWidth(options, getComputedStyle(el).font) + MENU_CHROME_PX
+    const maxWidth = window.innerWidth - gutter * 2
+    const width = Math.min(maxWidth, Math.max(rect.width, contentW))
+    let left = rect.left
+    if (left + width > window.innerWidth - gutter)
+      left = Math.max(gutter, window.innerWidth - gutter - width)
     setPos({
       top: openUp ? Math.max(8, rect.top - menuHeight - 4) : rect.bottom + 4,
-      left: rect.left,
-      width: Math.max(rect.width, 120),
+      left,
+      width,
     })
-  }, [options.length])
+  }, [options])
 
   const openMenu = useCallback((): void => {
     computePos()
@@ -181,7 +209,7 @@ export function SelectMenu({
 
   const triggerClasses
     = variant === 'input'
-      ? 'rounded border border-[var(--vscode-input-border,var(--vscode-panel-border))] bg-[var(--vscode-input-background)] px-2 py-1 text-xs text-[var(--vscode-input-foreground)] focus:ring-1 focus:ring-inset focus:ring-[var(--vscode-focusBorder)]'
+      ? 'w-full rounded border border-[var(--vscode-input-border,var(--vscode-panel-border))] bg-[var(--vscode-input-background)] px-2 py-1 text-xs text-[var(--vscode-input-foreground)] focus:ring-1 focus:ring-inset focus:ring-[var(--vscode-focusBorder)]'
       : 'rounded bg-transparent px-1 py-0 text-[10px] text-[var(--vscode-descriptionForeground)] hover:bg-[var(--vscode-toolbar-hoverBackground)]'
 
   return (
@@ -202,7 +230,7 @@ export function SelectMenu({
           className,
         )}
       >
-        <span className={cn('min-w-0 truncate', selected ? '' : 'opacity-50')}>
+        <span className={cn('min-w-0 flex-1 truncate', selected ? '' : 'opacity-50')}>
           {selected?.label ?? placeholder}
         </span>
         <ChevronDown className={cn('size-3.5 shrink-0', variant === 'ghost' && 'size-3')} />
@@ -244,8 +272,8 @@ export function SelectMenu({
                     <Check className="size-3.5" />
                   </span>
                   <span className="flex min-w-0 flex-col">
-                    <span className="truncate">{opt.label}</span>
-                    {opt.hint && <span className="truncate text-[10px] opacity-70">{opt.hint}</span>}
+                    <span className="truncate" title={opt.label}>{opt.label}</span>
+                    {opt.hint && <span className="truncate text-[10px] opacity-70" title={opt.hint}>{opt.hint}</span>}
                   </span>
                 </button>
               ))}