feat: add course bar length setting and clear blue glass Dock

mobile/lib/domain/app_settings.dart

@@ -11,7 +11,12 @@ class AppSettings {
     this.singleColorArgb = 0xFF348F91,
     this.calendarEnabled = false,
     this.calendarId,
+    this.courseHeightScale = defaultCourseHeightScale,
   });
+  static const defaultCourseHeightScale = 1.25;
+  static const minCourseHeightScale = 0.8;
+  static const maxCourseHeightScale = 2.0;
+  final double courseHeightScale;
   final Semester? semester;
   final bool remindersEnabled, calendarEnabled;
   final int reminderMinutes, singleColorArgb;
@@ -25,6 +30,7 @@ class AppSettings {
     int? singleColorArgb,
     bool? calendarEnabled,
     String? calendarId,
+    double? courseHeightScale,
   }) => AppSettings(
     semester: semester ?? this.semester,
     remindersEnabled: remindersEnabled ?? this.remindersEnabled,
@@ -33,5 +39,6 @@ class AppSettings {
     singleColorArgb: singleColorArgb ?? this.singleColorArgb,
     calendarEnabled: calendarEnabled ?? this.calendarEnabled,
     calendarId: calendarId ?? this.calendarId,
+    courseHeightScale: courseHeightScale ?? this.courseHeightScale,
   );
 }

mobile/lib/domain/app_snapshot.dart

@@ -62,6 +62,7 @@ class AppSnapshot {
       'singleColorArgb': settings.singleColorArgb,
       'calendarEnabled': settings.calendarEnabled,
       'calendarId': settings.calendarId,
+      'courseHeightScale': settings.courseHeightScale,
     },
     'importMetadata': importMetadata == null
         ? null
@@ -90,6 +91,15 @@ class AppSnapshot {
       }
       final color = s['singleColorArgb'] as int;
       if (color < 0 || color > 0xFFFFFFFF) throw const FormatException('颜色无效');
+      final rawHeight = s.containsKey('courseHeightScale')
+          ? s['courseHeightScale']
+          : AppSettings.defaultCourseHeightScale;
+      if (rawHeight is! num ||
+          !rawHeight.isFinite ||
+          rawHeight < AppSettings.minCourseHeightScale ||
+          rawHeight > AppSettings.maxCourseHeightScale) {
+        throw const FormatException('课程条长度无效');
+      }
       final sem = s['semester'];
       final term = sem == null
           ? null
@@ -110,6 +120,7 @@ class AppSnapshot {
           singleColorArgb: color,
           calendarEnabled: s['calendarEnabled'] as bool,
           calendarId: s['calendarId'] as String?,
+          courseHeightScale: rawHeight.toDouble(),
         ),
         importMetadata: metadata == null
             ? null