Let the GPS watermark be placed, sized and hung landscape

Three WATERMARK/FRAME behaviours that share the stamp geometry:

* GPS mark: drag it anywhere on the frame/photo area and pinch it bigger or
  smaller. The 0..1 anchor plus the size multiplier ride along in the export
  options, so a framed file (whose canvas IS the card/frame) burns the mark in
  at exactly the fraction the preview showed.
* The photo's own pinch zoom stays available while the WATERMARK editor is
  closed, so a two-finger zoom is never swallowed by the mark while its panel
  is open.
* WALL FRAME gains a WALL PORTRAIT / WALL LANDSCAPE chip: the artwork hangs
  in its own 4000x3117 orientation instead of the default 90-degree rotation.

src/components/AdjustmentPanel.tsx

@@ -48,6 +48,10 @@ interface AdjustmentPanelProps {
   // so it fits the chosen frame better.
   photoRotation: 0 | 90;
   onToggleRotation: () => void;
+  // FRAME tab (WALL FRAME only): hang the artwork landscape instead of the
+  // default portrait rotation.
+  wallLandscape: boolean;
+  onToggleWallLandscape: () => void;
   onToggleGeotag: (enabled: boolean) => void;
   onSaveRecipe: (name: string) => void;
   onDeleteRecipe: (id: string) => void;
@@ -142,6 +146,8 @@ export default function AdjustmentPanel({
   onUpdateAdjustments,
   onUpdateFrame,
   photoRotation,
+  wallLandscape,
+  onToggleWallLandscape,
   onToggleGeotag,
   onDeleteRecipe,
   customWm,
@@ -508,6 +514,13 @@ export default function AdjustmentPanel({
               active: photoRotation !== 0,
               onPress: onToggleRotation,
             })}
+            {selectedFrame === 'wallframe' &&
+              renderChip({
+                key: 'wall-orient',
+                label: wallLandscape ? 'WALL LANDSCAPE' : 'WALL PORTRAIT',
+                active: wallLandscape,
+                onPress: onToggleWallLandscape,
+              })}
           </ScrollView>
         );