Enable some extra lints for compass app client (#2560)

Enable a few more lints that were mostly followed already for
consistency.

compass_app/app/lib/ui/core/themes/dimens.dart

@@ -29,8 +29,8 @@ abstract final class Dimens {
   EdgeInsets get edgeInsetsScreenSymmetric => EdgeInsets.symmetric(
       horizontal: paddingScreenHorizontal, vertical: paddingScreenVertical);
 
-  static final Dimens desktop = _DimensDesktop();
-  static final Dimens mobile = _DimensMobile();
+  static const Dimens desktop = _DimensDesktop();
+  static const Dimens mobile = _DimensMobile();
 
   /// Get dimensions definition based on screen size
   factory Dimens.of(BuildContext context) =>
@@ -50,6 +50,8 @@ final class _DimensMobile extends Dimens {
 
   @override
   final double profilePictureSize = 64.0;
+
+  const _DimensMobile();
 }
 
 /// Desktop/Web dimensions
@@ -62,4 +64,6 @@ final class _DimensDesktop extends Dimens {
 
   @override
   final double profilePictureSize = 128.0;
+
+  const _DimensDesktop();
 }

compass_app/app/lib/ui/core/themes/theme.dart

@@ -2,10 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-import 'colors.dart';
-import '../ui/tag_chip.dart';
 import 'package:flutter/material.dart';
 
+import '../ui/tag_chip.dart';
+import 'colors.dart';
+
 abstract final class AppTheme {
   static const _textTheme = TextTheme(
     headlineLarge: TextStyle(

compass_app/app/lib/ui/core/ui/search_bar.dart

@@ -80,7 +80,9 @@ class _QueryText extends StatelessWidget {
     }
 
     return Text(
-      '$continent - ${dateFormatStartEnd(DateTimeRange(start: startDate, end: endDate))} - Guests: $guests',
+      '$continent - '
+      '${dateFormatStartEnd(DateTimeRange(start: startDate, end: endDate))} - '
+      'Guests: $guests',
       textAlign: TextAlign.center,
       style: Theme.of(context).textTheme.bodyLarge,
     );

compass_app/app/lib/ui/core/ui/tag_chip.dart

@@ -4,10 +4,11 @@
 
 import 'dart:ui';
 
-import '../themes/colors.dart';
 import 'package:flutter/material.dart';
 import 'package:google_fonts/google_fonts.dart';
 
+import '../themes/colors.dart';
+
 class TagChip extends StatelessWidget {
   const TagChip({
     super.key,
@@ -96,7 +97,7 @@ class TagChip extends StatelessWidget {
 
   // Note: original Figma file uses Google Sans
   // which is not available on GoogleFonts
-  _textStyle(BuildContext context) => GoogleFonts.openSans(
+  TextStyle _textStyle(BuildContext context) => GoogleFonts.openSans(
         textStyle: TextStyle(
           fontWeight: FontWeight.w500,
           fontSize: fontSize,