feat: harden Flow cold-start/force-quit and polish macOS dictation UX

Fix cold-start overlay recursion that overflowed the main-thread stack when
recording began while the ready overlay was still up; also remove temporary
on-screen Flow DEBUG panels after the orange-mic investigation, and land the
macOS overlay/catalog/layout polish plus related Flow recovery hardening.

OSGKeyboardExt/KeyboardViewController.swift

@@ -57,7 +57,11 @@ public final class KeyboardViewController: UIInputViewController {
         // Voice-first keyboard — hide the misleading "English" subtitle in Settings.
         primaryLanguage = "mis"
         OSGLog.keyboardExt.info("viewDidLoad — extension booted")
-        CustomLanguageModelManager.shared.prepareInBackgroundIfNeeded()
+        // Deliberately NO CustomLanguageModelManager prewarm here: the
+        // extension never runs ASR (the host app owns the microphone and
+        // the SpeechAnalyzer pipeline), and compiling/caching an LM inside
+        // the keyboard's ~60 MB jetsam budget risks the system killing the
+        // keyboard outright. The host app prewarms it on session start.
         setNeedsUpdateOfScreenEdgesDeferringSystemGestures()
         installKeyboardHeight()
         configureDictationBehavior()
@@ -84,6 +88,7 @@ public final class KeyboardViewController: UIInputViewController {
         setNeedsUpdateOfScreenEdgesDeferringSystemGestures()
         configureDictationBehavior()
         KeyboardSetupBridge.markExtensionAppearance(hasFullAccess: hasFullAccess)
+        state.debugHasFullAccess = hasFullAccess
         flowCoordinator.refreshSessionState()
         flowCoordinator.startSessionMonitor()
         configSync.syncOnboardingStateFromAppGroup()
@@ -126,6 +131,7 @@ public final class KeyboardViewController: UIInputViewController {
         textInserter = KeyboardTextInserter(
             state: state,
             insertText: { [weak self] text in self?.textDocumentProxy.insertText(text) },
+            contextBeforeInput: { [weak self] in self?.textDocumentProxy.documentContextBeforeInput },
             scheduleAutoClearError: { [weak self] in self?.scheduleAutoClearError() }
         )