Keep keyboard offsets tied to visibility

Derive app keyboard offsets from one provider-owned shared value so chat content, composer surfaces, and floating panels share the same policy.

Treat progress-zero keyboard samples as closed, even if Android reports a stale nonzero height.

packages/app/src/app/_layout.tsx

@@ -66,6 +66,7 @@ import { useActiveWorktreeNewAction } from "@/hooks/use-active-worktree-new-acti
 import { useGlobalNewWorkspaceAction } from "@/hooks/use-global-new-workspace-action";
 import { useFaviconStatus } from "@/hooks/use-favicon-status";
 import { useKeyboardShortcuts } from "@/hooks/use-keyboard-shortcuts";
+import { KeyboardShiftProvider } from "@/hooks/use-keyboard-shift-style";
 import { useCompactWebViewportZoomLock } from "@/hooks/use-compact-web-viewport-zoom-lock";
 import { useOpenProject } from "@/hooks/use-open-project";
 import { useAppSettings } from "@/hooks/use-settings";
@@ -945,9 +946,11 @@ function RootProviders({ children }: { children: ReactNode }) {
       <I18nProvider>
         <SafeAreaProvider>
           <KeyboardProvider>
-            <PortalProvider>
-              <BottomSheetModalProvider>{children}</BottomSheetModalProvider>
-            </PortalProvider>
+            <KeyboardShiftProvider>
+              <PortalProvider>
+                <BottomSheetModalProvider>{children}</BottomSheetModalProvider>
+              </PortalProvider>
+            </KeyboardShiftProvider>
           </KeyboardProvider>
         </SafeAreaProvider>
       </I18nProvider>