implemented foreign timetable support for students, teachers, rooms, and classes, including a searchable element picker with favorites support, introduced a capabilities system for feature gating, refactored the timetable UI into a reusable TimetableCalendarView component, and redesigned the chat input field with a unified emoji picker and integrated attachment actions.

lib/widget/emoji_picker_dialog.dart

@@ -0,0 +1,64 @@
+import 'package:emoji_picker_flutter/emoji_picker_flutter.dart' as emojis;
+import 'package:flutter/material.dart';
+
+import 'emoji_text.dart';
+
+/// Shows the app-wide emoji picker and resolves with the chosen emoji, or
+/// `null` if the dialog was dismissed without a selection.
+///
+/// Single source of truth for the picker styling so every entry point (message
+/// reactions, the compose field, …) looks and behaves the same.
+Future<String?> showEmojiPicker(
+  BuildContext context, {
+  String title = 'Emoji wählen',
+}) {
+  return showDialog<String>(
+    context: context,
+    builder: (pickerCtx) => AlertDialog(
+      contentPadding: const EdgeInsets.all(15),
+      titlePadding: const EdgeInsets.only(left: 6, top: 15),
+      title: Row(
+        children: [
+          IconButton(
+            onPressed: () => Navigator.of(pickerCtx).pop(),
+            icon: const Icon(Icons.arrow_back),
+          ),
+          const SizedBox(width: 10),
+          Text(title),
+        ],
+      ),
+      content: SizedBox(
+        width: double.maxFinite,
+        height: 360,
+        child: emojis.EmojiPicker(
+          config: emojis.Config(
+            height: 360,
+            emojiViewConfig: emojis.EmojiViewConfig(
+              backgroundColor: Theme.of(pickerCtx).canvasColor,
+              recentsLimit: 67,
+              emojiSizeMax: EmojiText.sizeLarge,
+              noRecents: const Text('Keine zuletzt verwendeten Emojis'),
+              columns: 7,
+            ),
+            bottomActionBarConfig: const emojis.BottomActionBarConfig(
+              enabled: false,
+            ),
+            categoryViewConfig: emojis.CategoryViewConfig(
+              backgroundColor: Theme.of(pickerCtx).hoverColor,
+              iconColorSelected: Theme.of(pickerCtx).primaryColor,
+              indicatorColor: Theme.of(pickerCtx).primaryColor,
+            ),
+            searchViewConfig: emojis.SearchViewConfig(
+              backgroundColor: Theme.of(pickerCtx).dividerColor,
+              hintText: 'Suchen',
+              buttonIconColor: Colors.white,
+            ),
+          ),
+          onEmojiSelected: (_, emoji) {
+            Navigator.of(pickerCtx).pop(emoji.emoji);
+          },
+        ),
+      ),
+    ),
+  );
+}

lib/widget/emoji_text.dart

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+import 'package:flutter/material.dart';
+
+/// Central place for rendering emoji glyphs (reactions, pickers, …).
+///
+/// Emojis used to be drawn as bare `Text(emoji)` widgets all over the Talk UI,
+/// which meant they inherited the small default body text size and looked
+/// inconsistent. [EmojiText] gives every emoji a uniform, comfortably large
+/// size and forces the platform's color-emoji font so the rendering is the same
+/// everywhere.
+class EmojiText extends StatelessWidget {
+  /// Size for emojis shown inline next to other text, e.g. reaction chips.
+  static const double sizeInline = 15;
+
+  /// Default size for standalone emojis, e.g. list leadings.
+  static const double sizeStandard = 20;
+
+  /// Size for primary tap targets, e.g. the quick-reaction buttons.
+  static const double sizeLarge = 24;
+
+  final String emoji;
+  final double size;
+
+  const EmojiText(this.emoji, {this.size = sizeStandard, super.key});
+
+  @override
+  Widget build(BuildContext context) => Text(
+    emoji,
+    style: TextStyle(
+      fontSize: size,
+      height: 1.0,
+      // Render emojis with the platform color-emoji font instead of the app
+      // font, so they look identical across all usages and devices.
+      fontFamilyFallback: const ['Noto Color Emoji', 'Apple Color Emoji'],
+    ),
+  );
+}