Fix provider sync, left mouse event handling

schemas/org.gnome.shell.extensions.quotes.gschema.xml

@@ -11,10 +11,10 @@
       <summary>Sync interval</summary>
       <description>Time in seconds between API synchronizations</description>
     </key>
-    <key name="api-url" type="s">
-      <default>'https://api.quotable.io/random'</default>
-      <summary>API URL</summary>
-      <description>URL for fetching quotes from remote server</description>
+    <key name="api-providers" type="s">
+      <default>'[{"name":"quotable","url":"https://api.quotable.io/random","method":"GET","mapping":{"text":"content","author":"author"},"enabled":true}]'</default>
+      <summary>API providers</summary>
+      <description>JSON array of API provider configurations</description>
     </key>
     <key name="font-size" type="i">
       <default>14</default>
@@ -46,5 +46,15 @@
       <summary>Use custom quotes</summary>
       <description>Whether to use custom quotes instead of built-in/synced quotes</description>
     </key>
+    <key name="show-change-indicator" type="b">
+      <default>true</default>
+      <summary>Show change indicator</summary>
+      <description>Whether to show countdown before quote changes</description>
+    </key>
+    <key name="indicator-duration" type="i">
+      <default>5</default>
+      <summary>Indicator duration</summary>
+      <description>Duration in seconds for the change indicator countdown</description>
+    </key>
   </schema>
 </schemalist>