🎨 style: Outline the In-Flight Steer Bubble and Move the Bolt Inline

The filled bubble read as a settled message. An outline reads as
provisional, which is what an in-flight steer is, and separates it from
the composer surface behind it.

- Border + bubble keeps the composer's rounded-3xl radius so it reads as
  anchored to the input rather than floating over it. Border stays
  NEUTRAL: the failed-steer row already owns a colored (red) border, so
  a colored outline on the happy path would read as a warning.
- The Zap moves inside the bubble, left of the text, where it prefixes
  the words as a status label instead of competing with cancel for the
  right edge. items-start pins it to the first line when text wraps.
- Cancel drops plain `opacity-0` for `[@media(hover:hover)]:opacity-0`,
  matching SteerPart's info affordance: a hover-revealed control is
  unreachable on touch until a first tap (the #14272 pattern).

client/src/components/Chat/Input/InFlightSteers.tsx

@@ -87,26 +87,34 @@ const InFlightSteer = memo(function InFlightSteer({
       <div className="flex max-w-full items-center gap-1.5">
         <div
           className={cn(
-            'markdown prose message-content dark:prose-invert light min-w-0 break-words',
+            /* Outlined, not just filled: an in-flight steer is provisional —
-            'rounded-3xl bg-surface-secondary px-4 py-2 text-sm text-text-primary dark:text-gray-20',
+             * the fill alone reads as a settled message. */
-            !enableUserMsgMarkdown && 'whitespace-pre-wrap',
+            'flex min-w-0 items-start gap-2 rounded-3xl border border-border-medium',
+            'bg-surface-secondary py-2 pl-3 pr-4 text-sm text-text-primary',
             sending && 'opacity-70',
           )}
         >
-          {enableUserMsgMarkdown ? <MarkdownLite content={steer.text} /> : steer.text}
+          <Zap className="mt-1 h-3.5 w-3.5 shrink-0 text-amber-500" aria-hidden="true" />
+          <span className="sr-only">{localize('com_ui_steer_in_flight')}</span>
+          <div
+            className={cn(
+              'markdown prose message-content dark:prose-invert light min-w-0 break-words',
+              'dark:text-gray-20',
+              !enableUserMsgMarkdown && 'whitespace-pre-wrap',
+            )}
+          >
+            {enableUserMsgMarkdown ? <MarkdownLite content={steer.text} /> : steer.text}
+          </div>
         </div>
-        <Zap
-          className={cn('h-3.5 w-3.5 shrink-0 text-amber-500', sending && 'opacity-50')}
-          aria-hidden="true"
-        />
-        <span className="sr-only">{localize('com_ui_steer_in_flight')}</span>
         {!sending && (
+          /* Hidden-at-rest only on hover-capable pointers: a hover-revealed
+           * control is unreachable on touch until a first tap. */
           <button
             type="button"
             aria-label={localize('com_ui_steer_cancel')}
             onClick={() => cancelSteer(steer)}
             data-testid="steer-cancel"
-            className="shrink-0 rounded-full p-1 text-text-secondary opacity-0 transition-opacity duration-200 hover:bg-surface-tertiary hover:text-text-primary focus-visible:opacity-100 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-border-xheavy group-hover:opacity-100"
+            className="shrink-0 rounded-full p-1 text-text-secondary transition-opacity duration-200 hover:bg-surface-tertiary hover:text-text-primary focus-visible:opacity-100 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-border-xheavy group-hover:opacity-100 [@media(hover:hover)]:opacity-0"
           >
             <X className="h-3.5 w-3.5" aria-hidden="true" />
           </button>

client/src/components/Chat/Input/__tests__/InFlightSteers.test.tsx

@@ -87,6 +87,18 @@ describe('InFlightSteers', () => {
     expect(screen.queryByTestId('in-flight-steers')).toBeNull();
   });
 
+  it('keeps cancel reachable on touch, hover-revealed on hover-capable pointers', () => {
+    renderSteers([
+      { steerId: 's-ack', text: 'waiting on boundary', status: 'pending', createdAt: 1 },
+    ]);
+    // A plain `opacity-0` reveal would make the bubble hover-dependent, so on
+    // touch the X would need a first tap to appear (see the #14272 pattern).
+    const cancel = screen.getByTestId('steer-cancel');
+    expect(cancel.className).toContain('[@media(hover:hover)]:opacity-0');
+    expect(cancel.className).toContain('group-hover:opacity-100');
+    expect(cancel.className).toContain('focus-visible:opacity-100');
+  });
+
   it('only offers cancel once the steer is acknowledged', () => {
     renderSteers([
       { steerId: 'local-1', text: 'still posting', status: 'sending', createdAt: 1 },