Align focus with aria-pressed on Region snap-back to FullPage

After pressing Esc on the Region overlay with no clip, the snap-back
clicked the fallback (Full Page) button — flipping aria-pressed to
match — but then explicitly focused the Region button. Screen readers
announced the wrong state ("Region toggle button, not pressed") while
the visual selected state correctly showed Full Page.

Focus the fallback button instead so aria-pressed and focus stay
aligned. Also covers the same pattern for non-FullPage fallbacks (if
modeBeforeRegion was Article, focus lands on Article after Esc).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: wikirby

src/scripts/renderer.ts

@@ -3010,9 +3010,11 @@ port.onMessage.addListener((message: any) => {
 		if (regionImages.length === 0) {
 			let fallbackMode = modeBeforeRegion || (pdfMode ? "pdf" : "fullpage");
 			let fallbackBtn = document.querySelector('.mode-btn[data-mode="' + fallbackMode + '"]') as HTMLButtonElement;
-			if (fallbackBtn) { fallbackBtn.click(); }
-			let regionBtn = document.querySelector('.mode-btn[data-mode="region"]') as HTMLElement;
-			if (regionBtn) { setTimeout(function() { regionBtn.focus(); }, 0); }
+			if (fallbackBtn) {
+				fallbackBtn.click();
+				// Focus follows aria-pressed — screen readers otherwise announce the wrong button state.
+				setTimeout(function() { fallbackBtn.focus(); }, 0);
+			}
 		} else {
 			// User cancelled mid-add but already has captures — stay in region mode
 			// so they can save what they have or add another region.