Fix PayPal billing flow and mobile admin UX

AGENTS.md

@@ -623,6 +623,134 @@ export default () => (
 | overflow-ellipsis | text-ellipsis |
 | decoration-slice | box-decoration-slice |
 | decoration-clone | box-decoration-clone |
+
+=== filament/filament rules ===
+
+## Filament
+
+- Filament is used by this application. Follow existing conventions for how and where it's implemented.
+- Filament is a Server-Driven UI (SDUI) framework for Laravel that lets you define user interfaces in PHP using structured configuration objects. Built on Livewire, Alpine.js, and Tailwind CSS.
+- Use the `search-docs` tool for official documentation on Artisan commands, code examples, testing, relationships, and idiomatic practices.
+
+### Artisan
+
+- Use Filament-specific Artisan commands to create files. Find them with `list-artisan-commands` or `php artisan --help`.
+- Inspect required options and always pass `--no-interaction`.
+
+### Patterns
+
+Use static `make()` methods to initialize components. Most configuration methods accept a `Closure` for dynamic values.
+
+Use `Get $get` to read other form field values for conditional logic:
+
+<code-snippet name="Conditional form field" lang="php">
+use Filament\Forms\Components\Select;
+use Filament\Forms\Components\TextInput;
+use Filament\Schemas\Components\Utilities\Get;
+
+Select::make('type')
+    ->options(CompanyType::class)
+    ->required()
+    ->live(),
+
+TextInput::make('company_name')
+    ->required()
+    ->visible(fn (Get $get): bool => $get('type') === 'business'),
+</code-snippet>
+
+Use `state()` with a `Closure` to compute derived column values:
+
+<code-snippet name="Computed table column" lang="php">
+use Filament\Tables\Columns\TextColumn;
+
+TextColumn::make('full_name')
+    ->state(fn (User $record): string => "{$record->first_name} {$record->last_name}"),
+</code-snippet>
+
+Actions encapsulate a button with optional modal form and logic:
+
+<code-snippet name="Action with modal form" lang="php">
+use Filament\Actions\Action;
+use Filament\Forms\Components\TextInput;
+
+Action::make('updateEmail')
+    ->form([
+        TextInput::make('email')->email()->required(),
+    ])
+    ->action(fn (array $data, User $record): void => $record->update($data)),
+</code-snippet>
+
+### Testing
+
+Authenticate before testing panel functionality. Filament uses Livewire, so use `livewire()` or `Livewire::test()`:
+
+<code-snippet name="Filament Table Test" lang="php">
+    livewire(ListUsers::class)
+        ->assertCanSeeTableRecords($users)
+        ->searchTable($users->first()->name)
+        ->assertCanSeeTableRecords($users->take(1))
+        ->assertCanNotSeeTableRecords($users->skip(1));
+</code-snippet>
+
+<code-snippet name="Filament Create Resource Test" lang="php">
+    livewire(CreateUser::class)
+        ->fillForm([
+            'name' => 'Test',
+            'email' => 'test@example.com',
+        ])
+        ->call('create')
+        ->assertNotified()
+        ->assertRedirect();
+
+    assertDatabaseHas(User::class, [
+        'name' => 'Test',
+        'email' => 'test@example.com',
+    ]);
+</code-snippet>
+
+<code-snippet name="Testing Validation" lang="php">
+    livewire(CreateUser::class)
+        ->fillForm([
+            'name' => null,
+            'email' => 'invalid-email',
+        ])
+        ->call('create')
+        ->assertHasFormErrors([
+            'name' => 'required',
+            'email' => 'email',
+        ])
+        ->assertNotNotified();
+</code-snippet>
+
+<code-snippet name="Calling Actions" lang="php">
+    use Filament\Actions\DeleteAction;
+    use Filament\Actions\Testing\TestAction;
+
+    livewire(EditUser::class, ['record' => $user->id])
+        ->callAction(DeleteAction::class)
+        ->assertNotified()
+        ->assertRedirect();
+
+    livewire(ListUsers::class)
+        ->callAction(TestAction::make('promote')->table($user), [
+            'role' => 'admin',
+        ])
+        ->assertNotified();
+</code-snippet>
+
+### Common Mistakes
+
+**Commonly Incorrect Namespaces:**
+- Form fields (TextInput, Select, etc.): `Filament\Forms\Components\`
+- Infolist entries (for read-only views) (TextEntry, IconEntry, etc.): `Filament\Forms\Components\`
+- Layout components (Grid, Section, Fieldset, Tabs, Wizard, etc.): `Filament\Schemas\Components\`
+- Schema utilities (Get, Set, etc.): `Filament\Schemas\Components\Utilities\`
+- Actions: `Filament\Actions\` (no `Filament\Tables\Actions\` etc.)
+- Icons: `Filament\Support\Icons\Heroicon` enum (e.g., `Heroicon::PencilSquare`)
+
+**Recent breaking changes to Filament:**
+- File visibility is `private` by default. Use `->visibility('public')` for public access.
+- `Grid`, `Section`, and `Fieldset` no longer span all columns by default.
 </laravel-boost-guidelines>
 
 ## Issue Tracking