refactor(mobile): form & form field (#25042)

* refactor: form & form field

* chore: remove unused components

---------

Co-authored-by: shenlong-tanwen <139912620+shalong-tanwen@users.noreply.github.com>
Co-authored-by: Alex <alex.tran1502@gmail.com>

mobile/packages/ui/lib/src/components/icon_button.dart

@@ -0,0 +1,54 @@
+import 'package:flutter/material.dart';
+import 'package:immich_ui/src/types.dart';
+
+class ImmichIconButton extends StatelessWidget {
+  final IconData icon;
+  final VoidCallback onPressed;
+  final ImmichVariant variant;
+  final ImmichColor color;
+  final bool disabled;
+
+  const ImmichIconButton({
+    super.key,
+    required this.icon,
+    required this.onPressed,
+    this.color = ImmichColor.primary,
+    this.variant = ImmichVariant.filled,
+    this.disabled = false,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    final colorScheme = Theme.of(context).colorScheme;
+
+    final background = switch (variant) {
+      ImmichVariant.filled => switch (color) {
+          ImmichColor.primary => colorScheme.primary,
+          ImmichColor.secondary => colorScheme.secondary,
+        },
+      ImmichVariant.ghost => Colors.transparent,
+    };
+
+    final foreground = switch (variant) {
+      ImmichVariant.filled => switch (color) {
+          ImmichColor.primary => colorScheme.onPrimary,
+          ImmichColor.secondary => colorScheme.onSecondary,
+        },
+      ImmichVariant.ghost => switch (color) {
+          ImmichColor.primary => colorScheme.primary,
+          ImmichColor.secondary => colorScheme.secondary,
+        },
+    };
+
+    final effectiveOnPressed = disabled ? null : onPressed;
+
+    return IconButton(
+      icon: Icon(icon),
+      onPressed: effectiveOnPressed,
+      style: IconButton.styleFrom(
+        backgroundColor: background,
+        foregroundColor: foreground,
+      ),
+    );
+  }
+}