merge: exit fullscreen on click outside, free Escape key

- Remove global Escape key listener that intercepted Escape before
  xterm.js could receive it, breaking vim/tmux/etc.
- Add click-outside-to-exit for fullscreen: clicking on the padding
  area around .terminal-page-content or .terminal-fullscreen-header
  exits fullscreen. Clicks inside content or header are ignored.
- Add 8px padding/gap to .terminal-page.fullscreen to create a
  clickable border area around the terminal.
- Keep Exit button and Alt+Shift+F as explicit exit methods.

Quality gates: tsc --noEmit (clean), pytest (208 passed, 6 pre-existing)

apps/web/src/pages/terminal.tsx

@@ -162,17 +162,21 @@ export const TerminalPage: React.FC = () => {
 		setActiveSessionId,
 	]);
 
-	// Exit fullscreen on Escape
-	useEffect(() => {
-		if (!isFullscreen) return;
-		const handleEscape = (e: KeyboardEvent) => {
-			if (e.key === "Escape") {
-				setIsFullscreen(false);
+	// Click outside terminal content/header to exit fullscreen
+	const handleFullscreenClick = useCallback(
+		(e: React.MouseEvent<HTMLElement>) => {
+			if (!isFullscreen) return;
+			const target = e.target as Node;
+			const current = e.currentTarget as HTMLElement;
+			const content = current.querySelector(".terminal-page-content");
+			const header = current.querySelector(".terminal-fullscreen-header");
+			if (content?.contains(target) || header?.contains(target)) {
+				return;
 			}
-		};
-		window.addEventListener("keydown", handleEscape);
-		return () => window.removeEventListener("keydown", handleEscape);
-	}, [isFullscreen]);
+			setIsFullscreen(false);
+		},
+		[isFullscreen],
+	);
 
 	const handleSelect = useCallback(
 		(sessionId: string) => {
@@ -302,7 +306,10 @@ export const TerminalPage: React.FC = () => {
 	}
 
 	return (
-		<section className={`terminal-page ${isFullscreen ? "fullscreen" : ""}`}>
+		<section
+			className={`terminal-page ${isFullscreen ? "fullscreen" : ""}`}
+			onClick={handleFullscreenClick}
+		>
 			{!isFullscreen && (
 				<div className="terminal-page-header">
 					<button

apps/web/src/styles.css

@@ -2887,8 +2887,8 @@ a.nav-item,
 	right: 0;
 	bottom: 0;
 	z-index: 1000;
-	padding: 0;
-	gap: 0;
+	padding: 8px;
+	gap: 8px;
 	background: #1e1e1e;
 }