fix(desktop): DeerFlow UI — ChatArea refactor + ai-elements + dead CSS cleanup

ChatArea retry button uses setInput instead of direct sendToGateway,
fix bootstrap spinner stuck for non-logged-in users,
remove dead CSS (aurora-title/sidebar-open/quick-action-chips),
add ai components (ReasoningBlock/StreamingText/ChatMode/ModelSelector/TaskProgress),
add ClassroomPlayer + ResizableChatLayout + artifact panel

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

crates/zclaw-saas/src/prompt/service.rs

@@ -4,7 +4,7 @@ use sqlx::PgPool;
 use crate::error::{SaasError, SaasResult};
 use crate::common::PaginatedResponse;
 use crate::common::normalize_pagination;
-use crate::models::{PromptTemplateRow, PromptVersionRow};
+use crate::models::{PromptTemplateRow, PromptVersionRow, PromptSyncStatusRow};
 use super::types::*;
 
 /// 创建提示词模板 + 初始版本
@@ -310,3 +310,21 @@ pub async fn check_updates(
         server_time: chrono::Utc::now().to_rfc3339(),
     })
 }
+
+/// 查询设备的提示词同步状态
+pub async fn get_sync_status(
+    db: &PgPool,
+    device_id: &str,
+) -> SaasResult<Vec<PromptSyncStatusRow>> {
+    let rows = sqlx::query_as::<_, PromptSyncStatusRow>(
+        "SELECT device_id, template_id, synced_version, synced_at \
+         FROM prompt_sync_status \
+         WHERE device_id = $1 \
+         ORDER BY synced_at DESC \
+         LIMIT 50"
+    )
+    .bind(device_id)
+    .fetch_all(db)
+    .await?;
+    Ok(rows)
+}