feat(api): add CheckPendingStatus server function

Accepts Vec<i64> of comment IDs, returns their current status.
IDs not found in DB return status 'gone'. Empty vec returns early.
Used by client to prune localStorage pending comments that are
no longer pending (approved/spam/trash/deleted).

src/api/comments/check.rs

@@ -0,0 +1,47 @@
+use dioxus::prelude::*;
+
+#[derive(Debug, Clone, serde::Serialize, serde::Deserialize)]
+pub struct PendingStatusItem {
+    pub id: i64,
+    pub status: String,
+}
+
+#[server(CheckPendingStatus, "/api")]
+pub async fn check_pending_status(ids: Vec<i64>) -> Result<Vec<PendingStatusItem>, ServerFnError> {
+    #[cfg(feature = "server")]
+    {
+        use crate::db::pool::get_conn;
+        use crate::api::error::AppError;
+
+        if ids.is_empty() {
+            return Ok(vec![]);
+        }
+
+        let client = get_conn().await.map_err(AppError::db_conn)?;
+
+        let rows = client
+            .query(
+                "SELECT id, status FROM comments WHERE id = ANY($1)",
+                &[&ids],
+            )
+            .await
+            .map_err(AppError::query)?;
+
+        let found: std::collections::HashMap<i64, String> = rows
+            .iter()
+            .map(|r| (r.get::<_, i64>(0), r.get::<_, String>(1)))
+            .collect();
+
+        let result: Vec<PendingStatusItem> = ids
+            .into_iter()
+            .map(|id| {
+                let status = found.get(&id).cloned().unwrap_or_else(|| "gone".to_string());
+                PendingStatusItem { id, status }
+            })
+            .collect();
+
+        Ok(result)
+    }
+    #[cfg(not(feature = "server"))]
+    unreachable!()
+}

src/api/comments/mod.rs

@@ -7,12 +7,14 @@ mod create;
 mod read;
 mod update;
 mod list;
+mod check;
 
 pub use types::*;
 pub use create::create_comment;
 pub use read::{get_comments, get_comment_count};
 pub use update::{approve_comment, spam_comment, trash_comment, batch_update_comment_status};
 pub use list::{get_pending_comments, get_pending_count, get_all_comments};
+pub use check::check_pending_status;
 
 #[cfg(feature = "server")]
 pub use markdown::render_comment_markdown;