v0.11.0 — OpenRouter model picker (#111)

v0.11.0 — OpenRouter model picker (AJAX refresh + cost preview + Phase-2 asset extract)

Replaces the free-text slug inputs for analysis_model, writing_model, and editor_model with a smart picker fed by a daily-refreshed OpenRouter model registry. Picker shows context size + input/output price + provider, filters by per-field capability, previews per-generation cost using existing cost-tracker history, and keeps a custom-slug fallback. Daily registry refresh fires from inside on_daily_generation() before lock acquire — no new top-level cron event.

Commit sequence (preserved for review):
- 353aa4e  feat(models): OpenRouter model picker + AJAX refresh + cost preview
- 283fa55  fix(phpcs): resolve 4 PHPCS violations in model-registry-refresh handler
- 1b1336a  style(phpcs): fix array syntax in model field + cost tracker
- 283f9f9  style(phpcs): fix tabs vs spaces in settings-page.php
- aa78591  refactor(assets): extract model-picker refresh handler to generic-handle file

Verification
- PHPCS strict (CI scope): 0 errors / 0 warnings
- PHPUnit: 206/206 (555 assertions, 2 pre-existing skips)
- All new files under 300-line cap (field renderer 163, AJAX handler 82)
- Security: AJAX nonce + manage_options cap; output escaped; input sanitized
- Phase 2 ready: zero PRAUTOBLOGGER_* coupling in registry/picker/AJAX classes; generic asset handle peptiderepo-model-picker

QA verdict: PASS (qa-reviews/prautoblogger/2026-04-23-aa78591.md)

Out of scope (untouched): cto-review.yml, prautoblogger_image_model field (Workers AI FLUX, Phase 3), Peptide Search AI / Peptide News fields (Phase 2).

Co-authored-by: Engineer PRAutoBlogger (in-session subagent) <engineer-prautoblogger@peptiderepo.users.noreply.github.com>

assets/admin/peptiderepo-model-picker.css

@@ -0,0 +1,6 @@
+/**
+ * Styling for model registry picker refresh functionality.
+ *
+ * Button animations and toast notifications are defined in admin.css.
+ * This file is reserved for model-picker-specific styles (future extensibility).
+ */

assets/admin/peptiderepo-model-picker.js

@@ -0,0 +1,58 @@
+/**
+ * Model registry refresh handler for PRAutoBlogger admin settings.
+ *
+ * Handles the "Refresh Model List" button click in the AI Models admin tab.
+ * Sends AJAX request to refresh the OpenRouter model registry cache and shows
+ * success/error toast notifications.
+ *
+ * @see admin/class-admin-page.php — Renders the refresh button + nonce.
+ * @see ajax/class-model-registry-refresh.php — Server-side handler.
+ */
+(function ($) {
+	'use strict';
+
+	// Refresh model registry button.
+	$(document).on('click', '#prautoblogger-refresh-models', function (e) {
+		e.preventDefault();
+		var $btn = $(this);
+		var nonce = $btn.data('nonce');
+		var originalText = $btn.html();
+
+		$btn.prop('disabled', true).addClass('ab-btn-loading');
+
+		$.ajax({
+			url: ajaxurl,
+			method: 'POST',
+			data: {
+				action: 'prautoblogger_refresh_models',
+				nonce: nonce
+			},
+			timeout: 30000
+		})
+		.done(function (response) {
+			if (response.success && response.data && response.data.message) {
+				// Show success toast
+				var $notice = $('<div class="ab-save-notice" role="status"></div>')
+					.html('<span class="dashicons dashicons-yes"></span> ' + response.data.message)
+					.insertBefore('.ab-layout')
+					.delay(4000)
+					.fadeOut(function () {
+						$(this).remove();
+					});
+			}
+		})
+		.fail(function () {
+			var $notice = $('<div class="ab-save-notice notice-error" role="alert"></div>')
+				.html('<span class="dashicons dashicons-warning"></span> ' + 'Failed to refresh model list. Please try again.')
+				.insertBefore('.ab-layout')
+				.delay(5000)
+				.fadeOut(function () {
+					$(this).remove();
+				});
+		})
+		.always(function () {
+			$btn.prop('disabled', false).removeClass('ab-btn-loading').html(originalText);
+		});
+	});
+
+})(jQuery);