fix transition flash between apps

- Set app-opening class BEFORE loading content to prevent flash
- Keep app-closing at opacity 0 after animation ends
- Remove unnecessary class removal in playCloseAnimation

src/main/assets/apps/shell/shell.lua

@@ -60,6 +60,12 @@ function loadAppContent_internal(app_id, app_path, skip_animation)
 
     -- Load app content using C++ function
     if loadAppContent then
+        -- Set opening animation BEFORE loading content to prevent flash
+        if not skip_animation then
+            app_container:SetClass("app-opening", true)
+            app_container:SetClass("app-closing", false)
+        end
+
         local success = loadAppContent(app_container, app_path)
         showLoading(false)
 
@@ -68,16 +74,11 @@ function loadAppContent_internal(app_id, app_path, skip_animation)
             current_app_path = app_path
             print("[Shell] App loaded: " .. app_id)
 
-            -- Play opening animation (unless skipped for initial load)
-            if not skip_animation then
-                app_container:SetClass("app-opening", true)
-                app_container:SetClass("app-closing", false)
-                -- Remove animation class after it completes
-                if setTimeout then
-                    setTimeout(function()
-                        app_container:SetClass("app-opening", false)
-                    end, 300)
-                end
+            -- Remove animation class after it completes
+            if not skip_animation and setTimeout then
+                setTimeout(function()
+                    app_container:SetClass("app-opening", false)
+                end, 300)
             end
 
             -- If home was loaded, populate apps dynamically
@@ -144,7 +145,8 @@ local function playCloseAnimation(callback)
         app_container:SetClass("app-closing", true)
         app_container:SetClass("app-opening", false)
         setTimeout(function()
-            app_container:SetClass("app-closing", false)
+            -- Don't remove app-closing yet - callback will load new content
+            -- and loadAppContent_internal will switch to app-opening
             if callback then callback() end
         end, 200)
     else

src/main/assets/apps/shell/shell.rml

@@ -58,6 +58,9 @@
 
         .app-closing {
             animation: 0.2s quadratic-in app-close;
+            /* Keep at end state after animation */
+            opacity: 0;
+            transform: scale(0.8);
         }
 
         @keyframes app-open {