feat: implement header/footer visibility controls for checkout and thankyou pages

- Created LayoutWrapper component to conditionally render header/footer based on route
- Created MinimalHeader component (logo only)
- Created MinimalFooter component (trust badges + policy links)
- Created usePageVisibility hook to get visibility settings per page
- Wrapped ClassicLayout with LayoutWrapper for conditional rendering
- Header/footer visibility now controlled directly in React SPA
- Settings: show/minimal/hide for both header and footer
- Background color support for checkout and thankyou pages

admin-spa/package-lock.json

@@ -27,6 +27,7 @@
                 "@radix-ui/react-radio-group": "^1.3.8",
                 "@radix-ui/react-select": "^2.2.6",
                 "@radix-ui/react-separator": "^1.1.7",
+                "@radix-ui/react-slider": "^1.3.6",
                 "@radix-ui/react-slot": "^1.2.3",
                 "@radix-ui/react-switch": "^1.2.6",
                 "@radix-ui/react-tabs": "^1.1.13",
@@ -2243,6 +2244,39 @@
                 }
             }
         },
+        "node_modules/@radix-ui/react-slider": {
+            "version": "1.3.6",
+            "resolved": "https://registry.npmjs.org/@radix-ui/react-slider/-/react-slider-1.3.6.tgz",
+            "integrity": "sha512-JPYb1GuM1bxfjMRlNLE+BcmBC8onfCi60Blk7OBqi2MLTFdS+8401U4uFjnwkOr49BLmXxLC6JHkvAsx5OJvHw==",
+            "license": "MIT",
+            "dependencies": {
+                "@radix-ui/number": "1.1.1",
+                "@radix-ui/primitive": "1.1.3",
+                "@radix-ui/react-collection": "1.1.7",
+                "@radix-ui/react-compose-refs": "1.1.2",
+                "@radix-ui/react-context": "1.1.2",
+                "@radix-ui/react-direction": "1.1.1",
+                "@radix-ui/react-primitive": "2.1.3",
+                "@radix-ui/react-use-controllable-state": "1.2.2",
+                "@radix-ui/react-use-layout-effect": "1.1.1",
+                "@radix-ui/react-use-previous": "1.1.1",
+                "@radix-ui/react-use-size": "1.1.1"
+            },
+            "peerDependencies": {
+                "@types/react": "*",
+                "@types/react-dom": "*",
+                "react": "^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc",
+                "react-dom": "^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc"
+            },
+            "peerDependenciesMeta": {
+                "@types/react": {
+                    "optional": true
+                },
+                "@types/react-dom": {
+                    "optional": true
+                }
+            }
+        },
         "node_modules/@radix-ui/react-slot": {
             "version": "1.2.3",
             "resolved": "https://registry.npmjs.org/@radix-ui/react-slot/-/react-slot-1.2.3.tgz",