feat: 格式从分组下沉到条目（v21）

- entry 新增 format（apps/posters/articles），老数据按根分组 view_mode 回填；seed 按分区写入
- 分组管理移除格式字段/显示，根分组只作容器
- 内容弹窗新增逐条格式选择，列表增加格式列；ItemEditor 保存时保留原格式
- 前台按 entry.format 渲染：卡片/分组页支持同组混合格式，详情按条目格式选模板
- 迁移后 live 20 应用 / 13 海报；cargo test 59 passed；Playwright 验证混合展示

src/db/catalog.rs

@@ -31,6 +31,7 @@ struct NodeRow {
 /// 条目行：与 `entry` 表的列一一对应
 struct EntryRow {
     key: String,
+    format: String,
     name: String,
     description: Option<String>,
     icon: Option<String>,
@@ -140,7 +141,7 @@ pub fn load_tree(conn: &Connection) -> Result<Value, StashError> {
         let entries = load_node_entries(conn, &node.key)?;
         let items = entries
             .iter()
-            .map(|entry| item_for(entry, format, tags))
+            .map(|entry| item_for(entry, tags))
             .collect::<Vec<_>>();
 
         let child_values = children
@@ -338,12 +339,12 @@ fn build_section(
     if section.allow_groups {
         object.insert(
             "groups".into(),
-            build_groups(conn, section, view_mode, &tags)?,
+            build_groups(conn, section, &tags)?,
         );
         let direct = load_node_entries(conn, &section.key)?;
         let items = direct
             .iter()
-            .map(|entry| item_for(entry, view_mode, &tags))
+            .map(|entry| item_for(entry, &tags))
             .collect::<Vec<_>>();
         object.insert("items".into(), json!(items));
     } else {
@@ -352,7 +353,7 @@ fn build_section(
         let entries = load_section_entries(conn, &section.key)?;
         let items = entries
             .iter()
-            .map(|entry| item_for(entry, view_mode, &tags))
+            .map(|entry| item_for(entry, &tags))
             .collect::<Vec<_>>();
         object.insert("items".into(), json!(items));
     }
@@ -360,20 +361,23 @@ fn build_section(
     Ok(Value::Object(object))
 }
 
-/// 按条目类型组装列表项。
-fn item_for(entry: &EntryRow, view_mode: &str, tags: &HashMap<String, Vec<String>>) -> Value {
-    match view_mode {
+/// 按条目自身的格式组装列表项。
+fn item_for(entry: &EntryRow, tags: &HashMap<String, Vec<String>>) -> Value {
+    let mut value = match entry.format.as_str() {
         "posters" => poster_item(entry, tags.get(&entry.key)),
         "articles" => article_item(entry, tags.get(&entry.key)),
         _ => app_item(entry),
+    };
+    if let Some(object) = value.as_object_mut() {
+        object.insert("format".into(), json!(entry.format));
     }
+    value
 }
 
 /// 取出某个分区下的分组，并把条目按 `node_key` 分派进去。
 fn build_groups(
     conn: &Connection,
     section: &NodeRow,
-    view_mode: &str,
     tags: &HashMap<String, Vec<String>>,
 ) -> Result<Value, StashError> {
     let mut stmt = conn
@@ -403,7 +407,7 @@ fn build_groups(
         let entries = load_node_entries(conn, &group_key)?;
         let items = entries
             .iter()
-            .map(|entry| item_for(entry, view_mode, tags))
+            .map(|entry| item_for(entry, tags))
             .collect::<Vec<_>>();
 
         rendered_groups.push(json!({
@@ -512,7 +516,8 @@ fn load_section_entries(
     let mut stmt = conn
         .prepare(
             "SELECT e.key, e.name, e.description, e.icon, e.href, e.cover,
-                    e.banner, e.badge, e.comment, e.summary, e.body, e.hot, e.views, e.likes
+                    e.banner, e.badge, e.comment, e.summary, e.body, e.hot, e.views, e.likes,
+                    COALESCE(e.format, 'apps')
              FROM entry e
              JOIN node p ON p.key = e.node_key
              WHERE COALESCE(p.parent_key, p.key) = ?1
@@ -537,6 +542,7 @@ fn load_section_entries(
                 hot: row.get(11)?,
                 views: row.get(12)?,
                 likes: row.get(13)?,
+                format: row.get(14)?,
             })
         })
         .map_err(map_error)?
@@ -549,7 +555,8 @@ fn load_section_entries(
 fn load_node_entries(conn: &Connection, node_key: &str) -> Result<Vec<EntryRow>, StashError> {    let mut stmt = conn
         .prepare(
             "SELECT e.key, e.name, e.description, e.icon, e.href, e.cover,
-                    e.banner, e.badge, e.comment, e.summary, e.body, e.hot, e.views, e.likes
+                    e.banner, e.badge, e.comment, e.summary, e.body, e.hot, e.views, e.likes,
+                    COALESCE(e.format, 'apps')
              FROM entry e
              WHERE e.node_key = ?1
              ORDER BY e.sort, e.key",
@@ -573,6 +580,7 @@ fn load_node_entries(conn: &Connection, node_key: &str) -> Result<Vec<EntryRow>,
                 hot: row.get(11)?,
                 views: row.get(12)?,
                 likes: row.get(13)?,
+                format: row.get(14)?,
             })
         })
         .map_err(map_error)?