Fix accessibility and image deletion issues in AccountViewView

- Fix aria-hidden conflict on trash can icon by wrapping in proper button element
- Fix image deletion API endpoint by extracting image ID from full URL
- Improve 404 error handling to clear local image reference when image already deleted
- Resolve accessibility warning and prevent invalid API calls

src/components/IdentitySection.vue

@@ -50,14 +50,16 @@
           tabindex="0"
           @click="emitShowLargeIdenticonUrl"
         />
-        <font-awesome
-          icon="trash-can"
+        <button
           class="text-red-500 fa-fw ml-8 mt-8 w-12 h-12"
-          role="button"
           aria-label="Delete profile image"
-          tabindex="0"
           @click="deleteImage"
-        />
+        >
+          <font-awesome
+            icon="trash-can"
+            aria-hidden="true"
+          />
+        </button>
       </span>
       <div v-else class="text-center">
         <template v-if="isRegistered">