docs: fix gallery and repo URLs

- Updated README.md to use the correct htmlpreview URL for Gitea
- Updated docs/gallery.html 'Back to README' link to point to the main repo URL

Made-with: Cursor

README.md

@@ -1,10 +1,10 @@
 # PI Weekly Newspaper
 
-[![Application Preview](docs/screenshots/mosaic_small.png)](https://htmlpreview.github.io/?https://github.com/cottongin/pi-weekly-newspaper/blob/master/docs/gallery.html)
+[![Application Preview](docs/screenshots/mosaic_small.png)](https://htmlpreview.github.io/?https://code.cottongin.xyz/cottongin/pi-weekly-newspaper/raw/branch/master/docs/gallery.html)
 
 Generates weekly ePub "newspapers" from the [Plymouth Independent](https://www.plymouthindependent.org/) RSS feed, optimized for the Xtreink X4 e-reader (800x480 screen).
 
-[📸 View all screenshots](docs/screenshots.md) | [🖼️ View Interactive Gallery](https://htmlpreview.github.io/?https://github.com/cottongin/pi-weekly-newspaper/blob/master/docs/gallery.html) | [🪟 Large Mosaic](docs/screenshots/mosaic_large.png)
+[📸 View all screenshots](docs/screenshots.md) | [🖼️ View Interactive Gallery](https://htmlpreview.github.io/?https://code.cottongin.xyz/cottongin/pi-weekly-newspaper/raw/branch/master/docs/gallery.html) | [🪟 Large Mosaic](docs/screenshots/mosaic_large.png)
 
 ## Quick Start
 

docs/gallery.html

@@ -180,7 +180,7 @@
         <img src="screenshots/08-settings.png" class="thumb" onclick="setSlide(7)">
     </div>
 
-    <a href="../README.md" class="back-link">&larr; Back to README</a>
+    <a href="https://code.cottongin.xyz/cottongin/pi-weekly-newspaper" class="back-link">&larr; Back to README</a>
 
     <script>
         let currentSlide = 0;