feat(model-picker): sortable column headers — Model, Price, Context

- Add .ab-mp-col-headers bar between search and list with three
  clickable column headers: Model (sorts by name), Price in/out
  (sorts by input_price_per_m), Context (sorts by context_length)
- Track sortState at module level so preference persists across
  open/close; clicking same column toggles asc/desc
- Deprecated models always sink to bottom regardless of sort column
- Add CSS for .ab-mp-col-headers, .ab-mp-col-header, .ab-mp-sort-arrow,
  .ab-mp-col-active; widths mirror existing row flex layout so columns
  visually align with data

Bumps version 0.13.1 → 0.13.2

prautoblogger.php

@@ -9,7 +9,7 @@
  * Plugin Name:       PRAutoBlogger
  * Plugin URI:        https://peptiderepo.com/prautoblogger
  * Description:       Monitors social media for trending topics, generates SEO-friendly blog posts using AI, and publishes them on a daily schedule with full cost tracking and self-improvement metrics.
- * Version:           0.13.1
+ * Version:           0.13.2
  * Requires at least: 6.0
  * Requires PHP:      7.4
  * Author:            PeptideRepo
@@ -35,7 +35,7 @@ if ( ! defined( 'ABSPATH' ) ) {
 | Defined here so every file in the plugin can reference paths, versions,
 | and limits without magic strings.
 */
-define( 'PRAUTOBLOGGER_VERSION', '0.13.1' );
+define( 'PRAUTOBLOGGER_VERSION', '0.13.2' );
 define( 'PRAUTOBLOGGER_DB_VERSION', '1.1.0' );
 define( 'PRAUTOBLOGGER_PLUGIN_FILE', __FILE__ );
 define( 'PRAUTOBLOGGER_PLUGIN_DIR', plugin_dir_path( __FILE__ ) );