honcho: plugin web pages with i18n, defer plugin detail to custom admin page

crates/skald-core/src/plugin/mod.rs

@@ -66,6 +66,10 @@ pub struct PluginPageInfo {
     pub icon:        String,
     pub priority:    i32,
     pub entry_url:   String,
+    /// Mirrors [`core_api::plugin::PluginPage::admin_only`]. Lets the admin
+    /// Plugins UI recognise a plugin's own config page and defer to it (hide the
+    /// generic `config_schema` form, link out instead).
+    pub admin_only:  bool,
     /// Fragment-contract version the host speaks. Always 1 for now — bump when
     /// the contract changes so old hosts can refuse new fragments cleanly.
     pub api_version: u32,
@@ -493,6 +497,7 @@ impl PluginManager {
                         icon:        page.icon.to_string(),
                         priority:    page.priority,
                         entry_url:   format!("/api/plugin/{}/{}", plugin.id(), page.entry),
+                        admin_only:  page.admin_only,
                         api_version: 1,
                     });
                 }

crates/skald-core/src/skald/accessors.rs

@@ -186,6 +186,18 @@ impl UserChannelApi for Skald {
             .unwrap_or(false)
     }
 
+    async fn is_admin(&self, user_id: &str) -> bool {
+        // Built-in admin role; an unknown user or a lookup error fails closed.
+        sqlx::query_as::<_, (String,)>("SELECT role_id FROM users WHERE id = ?")
+            .bind(user_id)
+            .fetch_optional(self.db().as_ref())
+            .await
+            .ok()
+            .flatten()
+            .map(|(r,)| r == crate::db::roles::ADMIN_ROLE_ID)
+            .unwrap_or(false)
+    }
+
     async fn user_for_session(&self, token: &str) -> Option<String> {
         self.sessions().user_of(token)
     }