feat(ground-suite): add system glass themes

ground-suite/lib/app/theme.dart

@@ -1,17 +1,100 @@
 import 'package:flutter/material.dart';
 
-ThemeData groundSuiteTheme() {
-  const seed = Color(0xff006c8f);
-  final scheme = ColorScheme.fromSeed(seedColor: seed);
+/// Orkavian's restrained green accent, used sparingly against neutral surfaces.
+const orkavianGreen = Color(0xff00ff41);
+
+ThemeData groundSuiteLightTheme() => _theme(
+  brightness: Brightness.light,
+  seed: const Color(0xff007a2e),
+  surface: const Color(0xfff6f8f5),
+  onSurface: const Color(0xff172019),
+  outline: const Color(0xffbdc7bc),
+);
+
+ThemeData groundSuiteDarkTheme() => _theme(
+  brightness: Brightness.dark,
+  seed: orkavianGreen,
+  surface: const Color(0xff0a0a0a),
+  onSurface: const Color(0xffe7e7e7),
+  outline: const Color(0xff333333),
+);
+
+ThemeData _theme({
+  required Brightness brightness,
+  required Color seed,
+  required Color surface,
+  required Color onSurface,
+  required Color outline,
+}) {
+  final scheme = ColorScheme.fromSeed(seedColor: seed, brightness: brightness)
+      .copyWith(
+        primary: seed,
+        onPrimary: brightness == Brightness.dark
+            ? const Color(0xff031207)
+            : Colors.white,
+        surface: surface,
+        onSurface: onSurface,
+        outline: outline,
+        surfaceContainer: brightness == Brightness.dark
+            ? const Color(0xff111111)
+            : const Color(0xffedf1ec),
+      );
 
   return ThemeData(
     useMaterial3: true,
     colorScheme: scheme,
-    scaffoldBackgroundColor: scheme.surface,
+    scaffoldBackgroundColor: Colors.transparent,
     visualDensity: VisualDensity.standard,
-    cardTheme: CardThemeData(
+    fontFamily: 'monospace',
+    cardTheme: const CardThemeData(
+      color: Colors.transparent,
       elevation: 0,
-      shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(12)),
+      margin: EdgeInsets.zero,
+    ),
+    dividerTheme: DividerThemeData(color: outline.withValues(alpha: 0.72)),
+    navigationRailTheme: NavigationRailThemeData(
+      backgroundColor: Colors.transparent,
+      indicatorColor: seed.withValues(
+        alpha: brightness == Brightness.dark ? 0.2 : 0.13,
+      ),
+      selectedIconTheme: IconThemeData(color: seed),
+      selectedLabelTextStyle: TextStyle(
+        color: seed,
+        fontWeight: FontWeight.w700,
+      ),
+    ),
+    navigationBarTheme: NavigationBarThemeData(
+      backgroundColor: Colors.transparent,
+      indicatorColor: seed.withValues(
+        alpha: brightness == Brightness.dark ? 0.2 : 0.13,
+      ),
+      labelTextStyle: WidgetStatePropertyAll(
+        TextStyle(color: onSurface, fontWeight: FontWeight.w600),
+      ),
+    ),
+    chipTheme: ChipThemeData(
+      backgroundColor: scheme.surfaceContainer.withValues(alpha: 0.72),
+      selectedColor: seed.withValues(
+        alpha: brightness == Brightness.dark ? 0.22 : 0.16,
+      ),
+      side: BorderSide(color: outline.withValues(alpha: 0.75)),
+      shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(10)),
+    ),
+    inputDecorationTheme: InputDecorationTheme(
+      filled: true,
+      fillColor: scheme.surfaceContainer.withValues(alpha: 0.7),
+      border: OutlineInputBorder(
+        borderRadius: BorderRadius.circular(14),
+        borderSide: BorderSide(color: outline),
+      ),
+      enabledBorder: OutlineInputBorder(
+        borderRadius: BorderRadius.circular(14),
+        borderSide: BorderSide(color: outline.withValues(alpha: 0.8)),
+      ),
+      focusedBorder: OutlineInputBorder(
+        borderRadius: BorderRadius.circular(14),
+        borderSide: BorderSide(color: seed, width: 1.5),
+      ),
     ),
   );
 }