pinakes-server: add GET /plugins/ui-pages endpoint

Signed-off-by: NotAShelf <raf@notashelf.dev>
Change-Id: Id09d4dce060e0a79586251a16fb6bdbc6a6a6964

crates/pinakes-server/src/dto/plugins.rs

@@ -1,3 +1,4 @@
+use pinakes_plugin_api::UiPage;
 use serde::{Deserialize, Serialize};
 
 #[derive(Debug, Serialize)]
@@ -21,6 +22,15 @@ pub struct TogglePluginRequest {
   pub enabled: bool,
 }
 
+/// A single plugin UI page entry in the list response
+#[derive(Debug, Serialize)]
+pub struct PluginUiPageEntry {
+  /// Plugin ID that provides this page
+  pub plugin_id: String,
+  /// Full page definition
+  pub page:      UiPage,
+}
+
 impl PluginResponse {
   #[must_use]
   pub fn new(meta: pinakes_plugin_api::PluginMetadata, enabled: bool) -> Self {