fix: improve error handling and validation in avatar, dialogue, and entity config loading

Author: Yarden-zamir

src/main/java/com/yardenzamir/simchat/client/AvatarManager.java

@@ -111,12 +111,12 @@ private static CachedTexture loadTexture(String imageId, Path imagePath, long mo
             NativeImage image = NativeImage.read(stream);
             DynamicTexture texture = new DynamicTexture(image);
 
-            ResourceLocation location = SimChatMod.id("avatar/" + imageId);
+            ResourceLocation location = SimChatMod.id("avatar/" + imageId.toLowerCase());
             Minecraft.getInstance().getTextureManager().register(location, texture);
 
             SimChatMod.LOGGER.debug("Loaded avatar texture: {}", imageId);
             return new CachedTexture(location, modTime, false);
-        } catch (IOException e) {
+        } catch (Exception e) {
             SimChatMod.LOGGER.error("Failed to load avatar image: {}", imagePath, e);
             return new CachedTexture(FALLBACK_TEXTURE, 0, true);
         }

src/main/java/com/yardenzamir/simchat/data/DialogueManager.java

@@ -17,6 +17,7 @@
 /**
  * Loads and manages dialogues from datapacks.
  * Dialogues are loaded from: data/<namespace>/simchat/<path>.json
+ * Only files with .json extension are loaded - other files (README.md, scripts, etc.) are ignored.
  */
 public class DialogueManager extends SimpleJsonResourceReloadListener {
 
@@ -38,6 +39,10 @@ protected void apply(Map<ResourceLocation, JsonElement> entries, ResourceManager
         for (Map.Entry<ResourceLocation, JsonElement> entry : entries.entrySet()) {
             ResourceLocation id = entry.getKey();
             try {
+                if (!entry.getValue().isJsonObject()) {
+                    SimChatMod.LOGGER.warn("Skipping non-object dialogue file: {}", id);
+                    continue;
+                }
                 DialogueData dialogue = DialogueData.fromJson(entry.getValue().getAsJsonObject());
                 dialogues.put(id, dialogue);
             } catch (Exception e) {

src/main/java/com/yardenzamir/simchat/data/EntityConfigManager.java

@@ -82,8 +82,10 @@ public static EntityConfig getConfig(String entityId) {
             }
 
             return cache.get(entityId);
-        } catch (IOException e) {
+        } catch (Exception e) {
             SimChatMod.LOGGER.error("Failed to load entity config for {}: {}", entityId, e.getMessage());
+            cache.remove(entityId);
+            lastModified.remove(entityId);
             return null;
         }
     }