feat(studio): move UNDO and REDO icons to mobile topbar outside hamburger menu

docker/frontend/src/styles/app.css

@@ -41,6 +41,7 @@
    children of the row — and the phone, which has not, gets the panel under the
    hamburger (see the narrow-screen rules below). */
 .bar-menu { display: contents; }
+.topbar-history { display: inline-flex; align-items: center; gap: 4px; }
 .bar-toggle { display: none; }
 /* The word a button keeps for that panel: the icon-only rules below take the
    words out of the row, and the panel is where they are read again. */
@@ -2139,14 +2140,14 @@ form[data-key='immich-modal'] {
   /* The bar stays at the top of the screen: the page itself never scrolls (the
      stage does), but the declaration is what makes that a promise rather than a
      coincidence. Sticky, not fixed — a positioned box still anchors the menus. */
-  .header { position: sticky; top: 0; z-index: 5; }
+  .header { position: sticky; top: 0; z-index: 5; flex-wrap: nowrap; gap: 8px; }
   .menu-wrap { position: static; }
   .popover { right: 8px; max-width: calc(100vw - 16px); }
   /* --- the phone's bar: one line and one panel -----------------------------
      The row of controls is what wraps the bar onto a second and a third line
      here, so it is taken out of the row and hung under a hamburger in the
-     corner: brand, page name, the button — and every control one tap away,
-     each wearing the name the icon-only rules below took from it. */
+     corner: brand, page name, undo/redo icons, the button — and every control
+     one tap away, each wearing the name the icon-only rules below took from it. */
   .bar-menu { display: none; }
   .bar-menu.open {
     display: flex;
@@ -2165,11 +2166,28 @@ form[data-key='immich-modal'] {
   }
   /* Nothing for the spacer to push against in a panel. */
   .bar-menu.open .spacer { display: none; }
+  .topbar-history {
+    display: inline-flex;
+    align-items: center;
+    gap: 4px;
+    margin-left: auto;
+  }
+  .topbar-history .btn.icon {
+    width: 32px;
+    height: 30px;
+    padding: 0;
+    display: inline-flex;
+    align-items: center;
+    justify-content: center;
+    font-size: 16px;
+    line-height: 1;
+    border-radius: 6px;
+  }
   .bar-toggle {
     display: inline-flex;
     align-items: center;
     justify-content: center;
-    margin-left: auto;
+    margin-left: 0;
     font-size: 15px;
     line-height: 1.2;
     padding: 4px 10px;

docker/frontend/src/ui/TopBar.tsx

@@ -95,6 +95,32 @@ export function TopBar({
       <b className="page-name">{t('nav.studio')}</b>
       <span className="recipe-name">{recipeName}</span>
 
+      {/* Topbar history controls (Undo/Redo): located directly on topbar with icons only, no text */}
+      <div className="topbar-history">
+        <button
+          type="button"
+          className="btn ghost icon"
+          data-key="undo"
+          disabled={!canUndo}
+          title={t('act.undo')}
+          aria-label={t('act.undo')}
+          onClick={onUndo}
+        >
+          <span aria-hidden="true">↺</span>
+        </button>
+        <button
+          type="button"
+          className="btn ghost icon"
+          data-key="redo"
+          disabled={!canRedo}
+          title={t('act.redo')}
+          aria-label={t('act.redo')}
+          onClick={onRedo}
+        >
+          <span aria-hidden="true">↻</span>
+        </button>
+      </div>
+
       {/* Everything the bar carries, in one box so a phone can fold it away:
           see `.bar-menu` — `display: contents` wherever the row has the room
           for the buttons, a panel under the hamburger where it has not. */}
@@ -139,33 +165,6 @@ export function TopBar({
           </button>
         ) : null}
 
-        {/* Both arrows are one icon wide, so the pair reads as one control: the
-            counter-clockwise arrow steps back, the clockwise one forward. They sit
-            with the name they would take back — after the mark and the preset. */}
-        <button
-          type="button"
-          className="btn ghost icon"
-          data-key="undo"
-          disabled={!canUndo}
-          title={t('act.undo')}
-          aria-label={t('act.undo')}
-          onClick={onUndo}
-        >
-          <span aria-hidden="true">↺</span>
-          <span className="mob-label">{t('act.undo')}</span>
-        </button>
-        <button
-          type="button"
-          className="btn ghost icon"
-          data-key="redo"
-          disabled={!canRedo}
-          title={t('act.redo')}
-          aria-label={t('act.redo')}
-          onClick={onRedo}
-        >
-          <span aria-hidden="true">↻</span>
-          <span className="mob-label">{t('act.redo')}</span>
-        </button>
         <span className="spacer" />
 
         {/* The catalogue's own reading runs in this tab whatever screen is up, so