fix(modes): clarify Build vs YOLO — Build can still pause; YOLO = no stops

Build mode: autonomous + broad permissions, may still pause at gates or
risky operations.
YOLO: Build + deep model + no stops, no confirmations at all.

- Fix Ask→Build confirm dialog message (was wrongly saying 'no further prompts')
- Fix YOLO notify messages to be accurate about what YOLO uniquely adds
- YOLO-off message clarifies Build may still pause

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

src/resources/extensions/sf/auto.js

@@ -1400,7 +1400,7 @@ export async function startAuto(ctx, pi, base, verboseMode, options) {
 		const confirmed = await showConfirm(ctx, {
 			title: "Switch to Build mode?",
 			message:
-				"You're in Ask mode. Autonomous execution requires Build mode — SF will execute without further prompts.",
+				"You're in Ask mode. Build mode runs autonomously with broad permissions — SF may still pause at gates or risky operations. Use Ctrl+Y for YOLO (no stops at all).",
 			confirmLabel: "Switch to Build",
 			declineLabel: "Stay in Ask",
 		});

src/resources/extensions/sf/steerable-autonomous-extension.js

@@ -89,11 +89,11 @@ export default function steerableAutonomousExtension(api) {
 			}
 			if (enabled) {
 				const msg = wasAsk
-					? "🚀 YOLO — switched to Build · autonomous · deep · unrestricted"
-					: "🚀 YOLO — autonomous · deep · unrestricted · no git prompts";
+					? "🚀 YOLO — Build mode · no stops · no confirmations"
+					: "🚀 YOLO — no stops · no confirmations · deep model";
 				ctx.ui.notify(msg, "success");
 			} else {
-				ctx.ui.notify("YOLO OFF — mode restored", "info");
+				ctx.ui.notify("YOLO OFF — Build mode restored (may still pause at gates)", "info");
 			}
 		},
 	});