fix(dashboard): keep mobile nav bar pinned when iOS keyboard opens

The visualViewport ICB compensation (intended for Android ICB-stuck-large
and pinch-zoom) was also reacting to iOS soft-keyboard shrinkage, pushing
the mobile bottom nav up above the keyboard. Pass the existing
`keyboardOpen` prop through to a `mobile-nav-bar--keyboard-open` modifier
class that pins `bottom: 0` so the keyboard simply covers the bar.

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

.changeset/fix-mobile-nav-keyboard-shift.md

@@ -0,0 +1,5 @@
+---
+"@runfusion/fusion": patch
+---
+
+Mobile (iOS): the bottom navigation bar no longer slides up when the on-screen keyboard appears. The viewport-compensation offset that pulls fixed elements back into the visible area (intended for Android ICB quirks / pinch-zoom) was also being driven by the keyboard's shrunken `visualViewport.height` on iOS, pushing the nav bar above the keyboard. The nav now ignores that offset while `keyboardOpen` is true and stays pinned at the page bottom — the keyboard simply covers it.

packages/dashboard/app/components/MobileNavBar.css

@@ -44,6 +44,14 @@
     bottom: var(--icb-bottom-offset, 0px);
   }
 
+  /* When the on-screen keyboard is open, ignore the visualViewport
+     compensation that would otherwise push the bar up by the keyboard
+     height (iOS shrinks vv.height; bottomOffset becomes ~keyboard height).
+     Pin the nav to the page bottom so the keyboard simply covers it. */
+  .mobile-nav-bar--keyboard-open {
+    bottom: 0;
+  }
+
   /* Content padding: mobile nav only (no footer). Bar is flush at bottom (no safe-area pad). */
   .project-content--with-mobile-nav:not(.project-content--with-footer) {
     padding-bottom: calc(var(--mobile-nav-height) + max(env(safe-area-inset-bottom, 0px), 12px) + var(--standalone-bottom-gap));

packages/dashboard/app/components/MobileNavBar.tsx

@@ -116,7 +116,7 @@ export function MobileNavBar({
   onChangeView,
   footerVisible,
   modalOpen = false,
-  keyboardOpen: _keyboardOpen = false,
+  keyboardOpen = false,
   onOpenSettings,
   onOpenActivityLog,
   onOpenSystemStats,
@@ -281,7 +281,7 @@ export function MobileNavBar({
     <>
       <nav
         ref={navRef}
-        className={`mobile-nav-bar${footerVisible ? " mobile-nav-bar--with-footer" : ""}`}
+        className={`mobile-nav-bar${footerVisible ? " mobile-nav-bar--with-footer" : ""}${keyboardOpen ? " mobile-nav-bar--keyboard-open" : ""}`}
         role="tablist"
         aria-label="Primary navigation"
       >