fix: remove duplicate sanitize_image_model method in admin-page

append-tail approach in prior fixup commit produced a second partial copy
of the sanitize_image_model() method (lines 342-350 truncated + lines
351-362 complete). Replaced entire file with 353-line canonical version.

Agent-Session: phase2-admin-m1-engineer

includes/admin/class-admin-page.php

@@ -18,11 +18,11 @@ declare(strict_types=1);
  */
 class PRAutoBlogger_Admin_Page {
 
-private const PAGE_SLUG    = 'prautoblogger-settings';
+	private const PAGE_SLUG    = 'prautoblogger-settings';
-private const OPTION_GROUP = 'prautoblogger_settings_group';
+	private const OPTION_GROUP = 'prautoblogger_settings_group';
 
 	/** Register the top-level PRAutoBlogger menu item. */
-public function on_register_menu(): void {
+	public function on_register_menu(): void {
 		add_menu_page(
 			__( 'PRAutoBlogger', 'prautoblogger' ),
 			__( 'PRAutoBlogger', 'prautoblogger' ),
@@ -32,10 +32,10 @@ public function on_register_menu(): void {
 			'dashicons-edit-page',
 			30
 		);
-}
+	}
 
 	/** Register all settings with the WordPress Settings API. */
-public function on_register_settings(): void {
+	public function on_register_settings(): void {
 		$sections = PRAutoBlogger_Settings_Fields::get_sections();
 		$fields   = PRAutoBlogger_Settings_Fields::get_fields();
 
@@ -56,10 +56,10 @@ public function on_register_settings(): void {
 			);
 			add_settings_field( $field['id'], $field['label'], array( $this, 'render_field' ), self::PAGE_SLUG, $section, $field );
 		}
-}
+	}
 
 	/** Enqueue admin CSS and JS on all PRAutoBlogger admin pages. */
-public function on_enqueue_assets( string $hook_suffix ): void {
+	public function on_enqueue_assets( string $hook_suffix ): void {
 		$pages = array(
 			'toplevel_page_' . self::PAGE_SLUG,
 			'prautoblogger_page_prautoblogger-board',
@@ -105,24 +105,24 @@ public function on_enqueue_assets( string $hook_suffix ): void {
 		if ( 'prautoblogger_page_prautoblogger-ideas' === $hook_suffix ) {
 			wp_enqueue_script( 'prautoblogger-ideas-browser', PRAUTOBLOGGER_PLUGIN_URL . 'assets/js/ideas-browser.js', array( 'jquery', 'prautoblogger-admin' ), PRAUTOBLOGGER_VERSION, true );
 		}
-}
+	}
 
 	/** Render the settings page (delegates to template). */
-public function render_page(): void {
+	public function render_page(): void {
 		if ( ! current_user_can( 'manage_options' ) ) {
 			return;
 		}
 		$sections = PRAutoBlogger_Settings_Fields::get_sections();
 		$fields   = PRAutoBlogger_Settings_Fields::get_fields();
 		include PRAUTOBLOGGER_PLUGIN_DIR . 'templates/admin/settings-page.php';
-}
+	}
 
 	/**
 	 * Render a single settings field based on its type.
 	 *
 	 * @param array<string, mixed> $args Field definition.
 	 */
-public function render_field( array $args ): void {
+	public function render_field( array $args ): void {
 		$id      = esc_attr( $args['id'] );
 		$type    = $args['type'] ?? 'text';
 		$default = $args['default'] ?? '';
@@ -243,16 +243,16 @@ public function render_field( array $args ): void {
 		if ( '' !== $desc ) {
 			printf( '<p class="ab-field-desc">%s</p>', esc_html( $desc ) );
 		}
-}
+	}
 
 	/**
 	 * Delegate source status rendering to the dedicated field class.
 	 *
 	 * @see admin/fields/class-source-status-field.php
 	 */
-private function render_source_status_field(): void {
+	private function render_source_status_field(): void {
 		PRAutoBlogger_Source_Status_Field::render();
-}
+	}
 
 	/**
 	 * Delegate model picker rendering to the dedicated field class.
@@ -263,9 +263,9 @@ private function render_source_status_field(): void {
 	 *
 	 * @see admin/fields/class-openrouter-model-field.php
 	 */
-private function render_model_select_field( string $id, string $value, array $args ): void {
+	private function render_model_select_field( string $id, string $value, array $args ): void {
 		PRAutoBlogger_OpenRouter_Model_Field::render( $id, $value, $args );
-}
+	}
 
 	/**
 	 * Sanitize a settings field value.
@@ -273,7 +273,7 @@ private function render_model_select_field( string $id, string $value, array $ar
 	 * @param mixed $value The submitted value.
 	 * @return mixed Sanitized value.
 	 */
-public function sanitize_field( $value ) {
+	public function sanitize_field( $value ) {
 		$option_name = '';
 		$filter      = current_filter();
 		if ( 0 === strpos( $filter, 'sanitize_option_' ) ) {
@@ -337,17 +337,8 @@ public function sanitize_field( $value ) {
 			return PRAutoBlogger_Image_Template_Filler::sanitize_for_save( (string) $value );
 		}
 		return sanitize_text_field( (string) $value );
-}
-
-	/** Validate model id against the registry and persist the derived provider. */
-private function sanitize_image_model( string $value ): string {
-	$candidate = sanitize_text_field( $value );
-	$provider  = PRAutoBlogger_Image_Model_Registry::provider_for( $candidate );
-	if ( '' !== $provider ) {
-		update_option( 'prautoblogger_image_provider', $provider );
-		return $candidate;
 	}
-	add_settings_error( 'prautoblogger_image_model', 'prautoblogger_image_model_unknown', sprintf( esc_html__( 'Image model "%s" is not in the registry. Keeping the previous selection.', 'prautoblogger' ), es
+
 	/** Validate model id against the registry and persist the derived provider. */
 	private function sanitize_image_model( string $value ): string {
 		$candidate = sanitize_text_field( $value );