Nicer Share Pics

src/main/java/net/javahippie/fitpub/controller/ActivityPubController.java

@@ -473,7 +473,12 @@ public class ActivityPubController {
             imageAttachment.put("type", "Image");
             imageAttachment.put("mediaType", "image/png");
             imageAttachment.put("url", imageUrl);
-            imageAttachment.put("name", "Activity map showing " + activity.getActivityType() + " route");
+            // The "name" field on an Image attachment is what Mastodon, other
+            // ActivityPub servers, and screen readers expose as the image
+            // description. Build a real prose description from the activity
+            // data instead of the previous "Activity map showing X route"
+            // placeholder. See ActivityImageService.buildImageAltText.
+            imageAttachment.put("name", activityImageService.buildImageAltText(activity));
             noteObject.put("attachment", List.of(imageAttachment));
         }
 

src/main/java/net/javahippie/fitpub/service/ActivityPostProcessingService.java

@@ -233,7 +233,11 @@ public class ActivityPostProcessingService {
                 imageAttachment.put("type", "Image");
                 imageAttachment.put("mediaType", "image/png");
                 imageAttachment.put("url", imageUrl);
-                imageAttachment.put("name", "Activity map showing " + activity.getActivityType() + " route");
+                // The "name" field on an Image attachment is what Mastodon and
+                // other ActivityPub servers expose as the image description /
+                // alt text. Build it from the same data the visual renderer
+                // uses so the two stay in sync.
+                imageAttachment.put("name", activityImageService.buildImageAltText(activity));
                 noteObject.put("attachment", List.of(imageAttachment));
             }
 

src/main/java/net/javahippie/fitpub/service/OsmTileRenderer.java

@@ -191,8 +191,11 @@ public class OsmTileRenderer {
             drawY = 0;
         }
 
-        // Fill background with neutral gray
-        g.setColor(new Color(240, 240, 240));
+        // Fill the letterbox margins with the FitPub dark background so the
+        // square share-image map blends seamlessly into the dark stats panel.
+        // (Was previously a neutral light gray that produced visible bars
+        // around non-square routes.)
+        g.setColor(new Color(0x0f, 0x05, 0x20));
         g.fillRect(0, 0, width, height);
 
         // Draw scaled image centered with preserved aspect ratio