feat(search button): Add a search button to the top of the subscription column

apps/desktop/changelog/next.md

@@ -2,6 +2,8 @@
 
 ## Shiny new things
 
+- add a button to open the search panel (#4296)
+
 ## Improvements
 
 ## No longer broken

apps/desktop/layer/renderer/src/modules/subscription-column/SubscriptionColumnHeader.tsx

@@ -165,5 +165,14 @@ const SearchTrigger = () => {
     { preventDefault: true },
   )
 
-  return null
+  const t = useI18n()
+  return (
+    <ActionButton
+      shortcut="$mod+K"
+      tooltip={t("words.search")}
+      onClick={() => setAppSearchOpen(true)}
+    >
+      <i className="i-mgc-search-3-cute-re text-text-secondary size-5" />
+    </ActionButton>
+  )
 }