feat: loop daily challenges

mobile-app/lib/l10n/app_en.arb

@@ -729,6 +729,9 @@
     "daily_challenge_start": "Start the challenge",
     "daily_challenge_completed_semantics": "Daily challenge completed. View past challenges.",
     "daily_challenge_card_semantics": "Daily challenge card",
+    "daily_challenge_archive_card_semantics": "A year of coding challenges. View the archive.",
+    "daily_challenge_archive_title": "A year of coding challenges",
+    "daily_challenge_view_archive": "View challenge archive",
     "daily_challenge_month_description": "Explore the daily coding challenges for {monthYear}. Stay motivated and keep your learning streak alive!",
     "@daily_challenge_month_description": {
         "description": "daily challenges view description for a month group",
@@ -781,11 +784,11 @@
             }
         }
     },
-    "new_daily_challenge_available": "New Daily Challenge Available! 🧩",
+    "new_daily_challenge_available": "Daily Coding Challenge",
     "@new_daily_challenge_available": {
         "description": "daily challenge notification title"
     },
-    "daily_challenge_notification_body": "A fresh coding challenge is waiting for you. Ready to solve it?",
+    "daily_challenge_notification_body": "Today's coding challenge is ready. Can you solve it?",
     "@daily_challenge_notification_body": {
         "description": "daily challenge notification body"
     },

mobile-app/lib/l10n/app_es.arb

@@ -650,6 +650,9 @@
   "daily_challenge_start": "Start the challenge",
   "daily_challenge_completed_semantics": "Daily challenge completed. View past challenges.",
   "daily_challenge_card_semantics": "Daily challenge card",
+  "daily_challenge_archive_card_semantics": "A year of coding challenges. View the archive.",
+  "daily_challenge_archive_title": "A year of coding challenges",
+  "daily_challenge_view_archive": "View challenge archive",
   "daily_challenge_month_description": "Explore the daily coding challenges for {monthYear}. Stay motivated and keep your learning streak alive!",
   "@daily_challenge_month_description": {
       "placeholders": {
@@ -691,8 +694,8 @@
           }
       }
   },
-  "new_daily_challenge_available": "New Daily Challenge Available! 🧩",
-  "daily_challenge_notification_body": "A fresh coding challenge is waiting for you. Ready to solve it?",
+  "new_daily_challenge_available": "Daily Coding Challenge",
+  "daily_challenge_notification_body": "Today's coding challenge is ready. Can you solve it?",
   "daily_challenge_notifications": "Daily Challenge Notifications",
   "daily_challenge_notifications_description": "Notifications for new daily coding challenges",
   "download_complete": "Download complete",

mobile-app/lib/l10n/app_localizations.dart

@@ -1205,6 +1205,24 @@ abstract class AppLocalizations {
   /// **'Daily challenge card'**
   String get daily_challenge_card_semantics;
 
+  /// No description provided for @daily_challenge_archive_card_semantics.
+  ///
+  /// In en, this message translates to:
+  /// **'A year of coding challenges. View the archive.'**
+  String get daily_challenge_archive_card_semantics;
+
+  /// No description provided for @daily_challenge_archive_title.
+  ///
+  /// In en, this message translates to:
+  /// **'A year of coding challenges'**
+  String get daily_challenge_archive_title;
+
+  /// No description provided for @daily_challenge_view_archive.
+  ///
+  /// In en, this message translates to:
+  /// **'View challenge archive'**
+  String get daily_challenge_view_archive;
+
   /// daily challenges view description for a month group
   ///
   /// In en, this message translates to:
@@ -1234,13 +1252,13 @@ abstract class AppLocalizations {
   /// daily challenge notification title
   ///
   /// In en, this message translates to:
-  /// **'New Daily Challenge Available! 🧩'**
+  /// **'Daily Coding Challenge'**
   String get new_daily_challenge_available;
 
   /// daily challenge notification body
   ///
   /// In en, this message translates to:
-  /// **'A fresh coding challenge is waiting for you. Ready to solve it?'**
+  /// **'Today\'s coding challenge is ready. Can you solve it?'**
   String get daily_challenge_notification_body;
 
   /// Android notification channel name for daily challenge notifications

mobile-app/lib/l10n/app_localizations_en.dart

@@ -651,6 +651,16 @@ class AppLocalizationsEn extends AppLocalizations {
   @override
   String get daily_challenge_card_semantics => 'Daily challenge card';
 
+  @override
+  String get daily_challenge_archive_card_semantics =>
+      'A year of coding challenges. View the archive.';
+
+  @override
+  String get daily_challenge_archive_title => 'A year of coding challenges';
+
+  @override
+  String get daily_challenge_view_archive => 'View challenge archive';
+
   @override
   String daily_challenge_month_description(String monthYear) {
     return 'Explore the daily coding challenges for $monthYear. Stay motivated and keep your learning streak alive!';
@@ -675,12 +685,11 @@ class AppLocalizationsEn extends AppLocalizations {
   }
 
   @override
-  String get new_daily_challenge_available =>
-      'New Daily Challenge Available! 🧩';
+  String get new_daily_challenge_available => 'Daily Coding Challenge';
 
   @override
   String get daily_challenge_notification_body =>
-      'A fresh coding challenge is waiting for you. Ready to solve it?';
+      'Today\'s coding challenge is ready. Can you solve it?';
 
   @override
   String get daily_challenge_notifications => 'Daily Challenge Notifications';

mobile-app/lib/l10n/app_localizations_es.dart

@@ -651,6 +651,16 @@ class AppLocalizationsEs extends AppLocalizations {
   @override
   String get daily_challenge_card_semantics => 'Daily challenge card';
 
+  @override
+  String get daily_challenge_archive_card_semantics =>
+      'A year of coding challenges. View the archive.';
+
+  @override
+  String get daily_challenge_archive_title => 'A year of coding challenges';
+
+  @override
+  String get daily_challenge_view_archive => 'View challenge archive';
+
   @override
   String daily_challenge_month_description(String monthYear) {
     return 'Explore the daily coding challenges for $monthYear. Stay motivated and keep your learning streak alive!';
@@ -675,12 +685,11 @@ class AppLocalizationsEs extends AppLocalizations {
   }
 
   @override
-  String get new_daily_challenge_available =>
-      'New Daily Challenge Available! 🧩';
+  String get new_daily_challenge_available => 'Daily Coding Challenge';
 
   @override
   String get daily_challenge_notification_body =>
-      'A fresh coding challenge is waiting for you. Ready to solve it?';
+      'Today\'s coding challenge is ready. Can you solve it?';
 
   @override
   String get daily_challenge_notifications => 'Daily Challenge Notifications';

mobile-app/lib/l10n/app_localizations_pt.dart

@@ -651,6 +651,16 @@ class AppLocalizationsPt extends AppLocalizations {
   @override
   String get daily_challenge_card_semantics => 'Daily challenge card';
 
+  @override
+  String get daily_challenge_archive_card_semantics =>
+      'A year of coding challenges. View the archive.';
+
+  @override
+  String get daily_challenge_archive_title => 'A year of coding challenges';
+
+  @override
+  String get daily_challenge_view_archive => 'View challenge archive';
+
   @override
   String daily_challenge_month_description(String monthYear) {
     return 'Explore the daily coding challenges for $monthYear. Stay motivated and keep your learning streak alive!';
@@ -675,12 +685,11 @@ class AppLocalizationsPt extends AppLocalizations {
   }
 
   @override
-  String get new_daily_challenge_available =>
-      'New Daily Challenge Available! 🧩';
+  String get new_daily_challenge_available => 'Daily Coding Challenge';
 
   @override
   String get daily_challenge_notification_body =>
-      'A fresh coding challenge is waiting for you. Ready to solve it?';
+      'Today\'s coding challenge is ready. Can you solve it?';
 
   @override
   String get daily_challenge_notifications => 'Daily Challenge Notifications';

mobile-app/lib/l10n/app_pt.arb

@@ -650,6 +650,9 @@
   "daily_challenge_start": "Start the challenge",
   "daily_challenge_completed_semantics": "Daily challenge completed. View past challenges.",
   "daily_challenge_card_semantics": "Daily challenge card",
+  "daily_challenge_archive_card_semantics": "A year of coding challenges. View the archive.",
+  "daily_challenge_archive_title": "A year of coding challenges",
+  "daily_challenge_view_archive": "View challenge archive",
   "daily_challenge_month_description": "Explore the daily coding challenges for {monthYear}. Stay motivated and keep your learning streak alive!",
   "@daily_challenge_month_description": {
       "placeholders": {
@@ -691,8 +694,8 @@
           }
       }
   },
-  "new_daily_challenge_available": "New Daily Challenge Available! 🧩",
-  "daily_challenge_notification_body": "A fresh coding challenge is waiting for you. Ready to solve it?",
+  "new_daily_challenge_available": "Daily Coding Challenge",
+  "daily_challenge_notification_body": "Today's coding challenge is ready. Can you solve it?",
   "daily_challenge_notifications": "Daily Challenge Notifications",
   "daily_challenge_notifications_description": "Notifications for new daily coding challenges",
   "download_complete": "Download complete",

mobile-app/lib/models/learn/daily_challenge_model.dart

@@ -90,7 +90,7 @@ class DailyChallengeLanguageData {
 
 /// Model representing a block of daily challenges for a specific month
 class DailyChallengeBlock {
-  final String monthYear; // e.g., "January 2025"
+  final String monthYear; // e.g., "January 2025" — used as an internal key
   final List<DailyChallengeOverview> challenges;
   final String description;
 
@@ -100,11 +100,14 @@ class DailyChallengeBlock {
     required this.description,
   });
 
+  // Year-agnostic display name, e.g. "January"
+  String get displayMonth => monthYear.split(' ').first;
+
   // Daily challenges don't have a block or a super block.
   // Return a `Block` here to allow daily challenges
   // to reuse the code for standard challenges.
   Block toCurriculumBlock() {
-    final blockName = 'Daily Challenges $monthYear';
+    final blockName = 'Daily Challenges $displayMonth';
     final blockDashedName =
         'daily-challenges-${monthYear.toLowerCase().replaceAll(' ', '-')}';
     return Block(

mobile-app/lib/service/learn/daily_challenge_service.dart

@@ -40,8 +40,12 @@ class DailyChallengeService {
   }
 
   Future<DailyChallenge> fetchChallengeByDate(String date) async {
+    // Convert YYYY-MM-DD to MM-DD for the year-agnostic /day/:day endpoint.
+    // Also accepts an already-converted MM-DD string.
+    final monthDay =
+        date.length == 10 ? date.substring(5) : date;
     final response = await _dio.get(
-        '${AuthenticationService.baseApiURL}/daily-coding-challenge/date/$date');
+        '${AuthenticationService.baseApiURL}/daily-coding-challenge/day/$monthDay');
 
     if (response.statusCode == 200) {
       return DailyChallenge.fromJson(response.data);

mobile-app/lib/ui/views/learn/daily_challenge/daily_challenge_view.dart

@@ -97,7 +97,7 @@ class DailyChallengeView extends StatelessWidget {
                     child: Padding(
                       padding: const EdgeInsets.all(8.0),
                       child: Text(
-                        block.monthYear,
+                        block.displayMonth,
                         style: TextStyle(
                           wordSpacing: 0,
                           letterSpacing: 0,

mobile-app/lib/ui/views/learn/daily_challenge/daily_challenge_viewmodel.dart

@@ -91,7 +91,8 @@ class DailyChallengeViewModel extends BaseViewModel {
           final block = DailyChallengeBlock(
             monthYear: monthYear,
             challenges: monthChallenges,
-            description: t.daily_challenge_month_description(monthYear),
+            description: t.daily_challenge_month_description(
+                monthYear.split(' ').first),
           );
 
           _blocks.add(block);
@@ -132,7 +133,8 @@ class DailyChallengeViewModel extends BaseViewModel {
     Block block = DailyChallengeBlock(
       monthYear: monthYear,
       challenges: [challenge],
-      description: t.daily_challenge_month_description(monthYear),
+      description: t.daily_challenge_month_description(
+          monthYear.split(' ').first),
     ).toCurriculumBlock();
 
     _navigationService.navigateTo(

mobile-app/lib/ui/views/learn/landing/landing_view.dart

@@ -1,5 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_svg/flutter_svg.dart';
+import 'package:freecodecamp/app/app.locator.dart';
+import 'package:freecodecamp/app/app.router.dart';
 import 'package:freecodecamp/extensions/i18n_extension.dart';
 import 'package:freecodecamp/models/learn/curriculum_model.dart';
 import 'package:freecodecamp/models/learn/motivational_quote_model.dart';
@@ -9,6 +11,7 @@ import 'package:freecodecamp/ui/views/learn/landing/landing_viewmodel.dart';
 import 'package:freecodecamp/ui/views/learn/widgets/daily_challenge_card.dart';
 import 'package:freecodecamp/ui/widgets/drawer_widget/drawer_widget_view.dart';
 import 'package:stacked/stacked.dart';
+import 'package:stacked_services/stacked_services.dart';
 
 class LearnLandingView extends StatelessWidget {
   const LearnLandingView({super.key});
@@ -324,6 +327,79 @@ class SuperBlockButton extends StatelessWidget {
   }
 }
 
+class DailyChallengeButton extends StatelessWidget {
+  const DailyChallengeButton({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    final navigationService = locator<NavigationService>();
+
+    return Container(
+      padding: const EdgeInsets.symmetric(
+        vertical: 6,
+        horizontal: 4,
+      ),
+      constraints: BoxConstraints(
+        minHeight: 80,
+      ),
+      child: ElevatedButton(
+        style: ElevatedButton.styleFrom(
+          padding: const EdgeInsets.all(5),
+          backgroundColor: FccColors.gray80,
+          side: const BorderSide(
+            width: 2,
+            color: FccColors.gray75,
+          ),
+          shape: RoundedRectangleBorder(
+            borderRadius: BorderRadius.all(Radius.circular(5)),
+            side: const BorderSide(
+              color: Colors.teal,
+              width: 2.0,
+            ),
+          ),
+        ),
+        onPressed: () {
+          navigationService.navigateTo(Routes.dailyChallengeView);
+        },
+        child: Row(
+          children: [
+            Padding(
+              padding: const EdgeInsets.all(12.0),
+              child: SizedBox(
+                width: 36,
+                height: 36,
+                child: Icon(
+                  Icons.calendar_today,
+                  color: FccColors.gray00,
+                  size: 36,
+                ),
+              ),
+            ),
+            Expanded(
+              flex: 8,
+              child: Text(
+                context.t.daily_challenge_view_archive,
+                textAlign: TextAlign.left,
+                style: const TextStyle(fontSize: 20),
+              ),
+            ),
+            const Expanded(
+              flex: 2,
+              child: Align(
+                alignment: Alignment.centerRight,
+                child: Padding(
+                  padding: EdgeInsets.symmetric(vertical: 8, horizontal: 12),
+                  child: Icon(Icons.arrow_forward_ios),
+                ),
+              ),
+            )
+          ],
+        ),
+      ),
+    );
+  }
+}
+
 class QuoteWidget extends StatelessWidget {
   const QuoteWidget({
     super.key,

mobile-app/lib/ui/views/learn/landing/landing_viewmodel.dart

@@ -248,6 +248,19 @@ class LearnLandingViewModel extends BaseViewModel {
 
             widgetOrder.add(button);
           }
+
+          // Insert daily challenge archive after core curriculum
+          if (stage == 'core') {
+            widgetOrder.add(
+              Text(
+                t.daily_challenge_archive_title,
+                style: headerStyle,
+              ),
+            );
+            widgetOrder.add(
+              const DailyChallengeButton(),
+            );
+          }
         }
       }