feat: Implement member self-service features for profile change requests and event responses

- Added MemberProfileChangeRequest and MemberEventResponse models with associations.
- Created API endpoints for member dashboard, profile change requests, event responses, and training attendance updates.
- Developed MemberHomeView component to display member-specific information and actions.
- Updated routing to include new member dashboard and profile change request functionalities.
- Added SQL migration scripts for new database tables related to member self-service.
- Enhanced login functionality to redirect members based on their roles and club associations.

backend/migrations/20260723_add_member_self_service_phase2.sql

@@ -0,0 +1,27 @@
+CREATE TABLE member_profile_change_requests (
+  id INT AUTO_INCREMENT PRIMARY KEY,
+  club_id INT NOT NULL,
+  member_id INT NOT NULL,
+  requested_by_user_id INT NOT NULL,
+  requested_changes JSON NOT NULL,
+  status ENUM('open', 'approved', 'rejected') NOT NULL DEFAULT 'open',
+  review_note TEXT NULL,
+  reviewed_by_user_id INT NULL,
+  reviewed_at DATETIME NULL,
+  created_at DATETIME NOT NULL,
+  updated_at DATETIME NOT NULL,
+  INDEX member_profile_change_requests_club_status (club_id, status),
+  INDEX member_profile_change_requests_member_status (member_id, status)
+);
+
+CREATE TABLE member_event_responses (
+  id INT AUTO_INCREMENT PRIMARY KEY,
+  club_id INT NOT NULL,
+  event_id INT NOT NULL,
+  member_id INT NOT NULL,
+  status ENUM('attending', 'declined') NOT NULL,
+  created_at DATETIME NOT NULL,
+  updated_at DATETIME NOT NULL,
+  UNIQUE KEY member_event_responses_event_member (event_id, member_id),
+  INDEX member_event_responses_club_event (club_id, event_id)
+);