feat: add Shift Planning module with full CRUD, attendance, and reporting

- Add shifts, shift_staff, and shift_attendance migrations
- Add Shift, ShiftStaff, ShiftAttendance Eloquent models with auditing
- Add ShiftService with business logic (create, start, complete, assign staff, mark attendance, reports, timesheets)
- Add ShiftResource with list, create, edit, and attendance management pages
- Add staff and attendance relation managers
- Add standalone pages: ActiveShifts, StaffManagement, ShiftReports, Timesheets
- Add dashboard widgets: ShiftOverview stats, TodaysShifts table
- Add ShiftPolicy for role-based authorization
- Add 10 shift permissions and manager role to RolePermissionSeeder
- Update User model with shift relationships
- Fix audits table migration with required columns for owen-it/laravel-auditing
- Update DatabaseSeeder to create admin user and call RolePermissionSeeder
- Switch docker-compose to MariaDB 10.11 for Docker Desktop compatibility

src/app/Filament/Resources/ShiftResource/RelationManagers/AttendancesRelationManager.php

@@ -0,0 +1,45 @@
+<?php
+
+namespace App\Filament\Resources\ShiftResource\RelationManagers;
+
+use Filament\Resources\RelationManagers\RelationManager;
+use Filament\Tables;
+use Filament\Tables\Table;
+
+class AttendancesRelationManager extends RelationManager
+{
+    protected static string $relationship = 'attendances';
+
+    protected static ?string $title = 'Attendance';
+
+    public function table(Table $table): Table
+    {
+        return $table
+            ->columns([
+                Tables\Columns\TextColumn::make('user.name')
+                    ->label('Staff Member')
+                    ->searchable(),
+                Tables\Columns\BadgeColumn::make('status')
+                    ->colors([
+                        'gray' => 'not_marked',
+                        'success' => 'present',
+                        'danger' => 'absent',
+                    ])
+                    ->formatStateUsing(fn (string $state) => match ($state) {
+                        'not_marked' => 'Not Marked',
+                        'present' => 'Present',
+                        'absent' => 'Absent',
+                        default => $state,
+                    }),
+                Tables\Columns\TextColumn::make('marker.name')
+                    ->label('Marked By')
+                    ->placeholder('—'),
+                Tables\Columns\TextColumn::make('marked_at')
+                    ->label('Marked At')
+                    ->dateTime()
+                    ->placeholder('—'),
+            ])
+            ->actions([])
+            ->bulkActions([]);
+    }
+}