feat: Update documentation for icon set and release notes

Updates the functional manual to specify the default icon set and includes changelog entries for version 0.13.0, detailing icon set refresh and codebase cleanup.

Author: beNative

docs/CHANGELOG.md

@@ -1,5 +1,13 @@
 # Version Log
 
+## v0.13.0 - The Phoenix Update
+
+This release focuses on internal refinement and stability. Like a phoenix, the codebase has been renewed, resulting in a cleaner, more reliable foundation for future features.
+
+### Refinements & Fixes
+-   **Icon Set Refresh:** Replaced corrupted icon sets (Heroicons, Lucide) with fresh copies to ensure they render correctly. The default icon set for new users is now 'Feather'.
+-   **Codebase Cleanup:** Performed a major code cleanup, removing over five obsolete files and unused code to improve performance and maintainability. Global styles were also centralized for better organization.
+
 ## v0.12.0 - The Power User Update
 
 This update introduces a suite of features for advanced users, offering deeper control over application settings and a more refined user experience.

docs/MANUAL_FUNCTIONAL.md

@@ -88,7 +88,7 @@ Click the "Settings" tab in the header to access the configuration page. The pag
     -   Here you can directly edit the JSON data for your custom presets in a code editor that provides syntax highlighting. This allows for advanced editing, re-ordering, and sharing.
     -   You can reset to the application's default presets at any time.
 -   **Application Tab:**
-    -   **Icon Set:** Customize the visual style of icons throughout the application. You can choose from Heroicons, Lucide, Feather, and Tabler.
+    -   **Icon Set:** Customize the visual style of icons throughout the application. You can choose from Heroicons, Lucide, Feather, and Tabler. The default icon set is 'Feather'.
     -   **UI Scale:** Adjust the overall size of the entire application interface using a slider, from 50% to 400%. Changes must be confirmed by clicking the "Apply" button. Your preference is saved automatically and applied on the next launch.
     -   **Desktop App Options:** When running as a desktop application, you can configure developer-centric options. This includes enabling notifications for pre-release (beta) versions and automatically opening the DevTools on startup. A restart is required for the pre-release setting to take effect.
 -   **Data Management Tab:**

package.json

@@ -1,6 +1,6 @@
 {
   "name": "udio-prompt-crafter",
-  "version": "0.12.0",
+  "version": "0.13.0",
   "description": "A powerful GUI to help musicians craft high-quality UDIO prompts by choosing from curated style tags. Features a live prompt preview, JSON output, preset management, and quality assistance.",
   "author": "Tim Sinaeve",
   "main": "dist/electron/main.js",