feat(themes): flag unpublished edits and share parallax motion

Compare theme content hashes with a stored Workshop baseline so creators
can see when their local copy is not synced. Extract pointer tracking into
a shared action for the launcher and editor preview, and use the slider
component for parallax depth.

src-tauri/capabilities/default.json

@@ -195,6 +195,26 @@
         }
       ]
     },
+    {
+      "identifier": "fs:allow-stat",
+      "allow": [
+        {
+          "path": "$HOME/.ezpplauncher"
+        },
+        {
+          "path": "$HOME/.ezpplauncher/*"
+        },
+        {
+          "path": "$HOME/.ezpplauncher/**/*"
+        },
+        {
+          "path": "$HOME/.ezpplauncher/**/.*"
+        },
+        {
+          "path": "$HOME/.ezpplauncher/**/.*/**"
+        }
+      ]
+    },
     {
       "identifier": "fs:allow-mkdir",
       "allow": [