fix: v0.5.1 - window/tray behavior, model table & capability UI polish

- Window: minimize keeps taskbar button (remove minimize-to-tray hook); close button hides to tray; tray left-click always shows + focuses window
- Dashboard model table: model column auto-width (whitespace-nowrap, no truncation)
- Capabilities editor: expose only thinking; image_in/video_in/tool_use still auto-derived from models.dev
- Model mapping table: theme-aware row divider (fix harsh dark line in light mode)

src/components/dashboard/DashboardPage.tsx

@@ -228,7 +228,7 @@ export function DashboardPage() {
                             }}
                           />
                           <div className="min-w-0">
-                            <div className="text-content-primary truncate">{m.modelDisplay || m.model}</div>
+                            <div className="text-content-primary whitespace-nowrap">{m.modelDisplay || m.model}</div>
                             {m.costEstimated && (
                               <span className="text-[10px] text-yellow-600">估算</span>
                             )}