Fix UI padding and text flush against container edges

- Remove global * { padding: 0 } reset that was overriding all Tailwind
  padding classes (unlayered CSS beats Tailwind v4 @layer utilities)
- Add color-scheme: dark to fix native form controls (select dropdowns)
  rendering with white backgrounds
- Make sidebar responsive (25% width, min 224px, max 320px)
- Increase internal padding on TopBar, Sidebar, ProjectList, StatusBar
- Add flex-shrink-0 to TopBar status indicators to prevent clipping
- Allow project action buttons to wrap on narrow sidebars
- Increase terminal view padding for breathing room

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

app/src/components/layout/TopBar.tsx

@@ -6,10 +6,10 @@ export default function TopBar() {
 
   return (
     <div className="flex items-center h-10 bg-[var(--bg-secondary)] border border-[var(--border-color)] rounded-lg overflow-hidden">
-      <div className="flex-1 overflow-x-auto">
+      <div className="flex-1 overflow-x-auto pl-2">
         <TerminalTabs />
       </div>
-      <div className="flex items-center gap-2 px-3 text-xs text-[var(--text-secondary)]">
+      <div className="flex items-center gap-2 px-4 flex-shrink-0 text-xs text-[var(--text-secondary)]">
         <StatusDot ok={dockerAvailable === true} label="Docker" />
         <StatusDot ok={imageExists === true} label="Image" />
       </div>