feat(web): 海选按场景分组 + 删场景点位页签 + 演出真实底图 + 破缓存

- 海选审核左侧改两列：场景列(按新字段 ir.scene 手动归类聚合，含全部/未分类) + 该场景事件列
- 删独立「场景/点位」页签(pointview.js 保留未引用)
- 演出配置 Timeline 接真实场景俯视底图(setupShot 覆盖投影范围 + drawStage 叠图，复用 /api/pointsets 的 shot)
- 事件 meta 加「所属场景」归类输入框(datalist 提示已有场景名)
- db: events 加 scene 列 + 旧库 ALTER 迁移；upsert 镜像 ir.scene；list 返回
- app.py: 首页按文件 mtime 给 js/css 注入 ?v= 破浏览器缓存(根治新html配旧缓存js崩溃→弹口令)

web/db.py

@@ -32,6 +32,7 @@ def init_db(path=None):
                 "group"    TEXT PRIMARY KEY,
                 title      TEXT,
                 theme      TEXT,
+                scene      TEXT DEFAULT '',
                 status     TEXT NOT NULL DEFAULT 'pending',
                 ir_json    TEXT NOT NULL,
                 updated_at TEXT,
@@ -39,6 +40,11 @@ def init_db(path=None):
                 notes      TEXT
             )"""
         )
+        # 旧库迁移：补 scene 列（海选审核按场景分组的归类维度，镜像自 ir.scene）。
+        try:
+            c.execute("ALTER TABLE events ADD COLUMN scene TEXT DEFAULT ''")
+        except sqlite3.OperationalError:
+            pass  # 已存在
         c.execute(
             """CREATE TABLE IF NOT EXISTS sessions (
                 token      TEXT PRIMARY KEY,
@@ -80,7 +86,7 @@ def purge_sessions(now, path=None):
 
 def list_events(status=None, path=None):
     """列表（不含 ir_json，轻量）。"""
-    sql = ('SELECT "group", title, theme, status, updated_at, updated_by, notes '
+    sql = ('SELECT "group", title, theme, scene, status, updated_at, updated_by, notes '
            "FROM events")
     args = []
     if status and status != "all":
@@ -106,21 +112,22 @@ def upsert_event(ir, by, now, notes=None, keep_status=True, path=None):
     group = ir["id"]
     title = ir.get("title", "")
     theme = ir.get("theme", "")
+    scene = ir.get("scene", "") or ""   # 海选审核分组维度，镜像自 ir.scene
     ir_str = json.dumps(ir, ensure_ascii=False)
     with _conn(path) as c:
         exists = c.execute('SELECT status FROM events WHERE "group" = ?',
                            (group,)).fetchone()
         if exists:
             c.execute(
-                'UPDATE events SET title=?, theme=?, ir_json=?, updated_at=?, '
+                'UPDATE events SET title=?, theme=?, scene=?, ir_json=?, updated_at=?, '
                 'updated_by=?, notes=COALESCE(?, notes) WHERE "group"=?',
-                (title, theme, ir_str, now, by, notes, group),
+                (title, theme, scene, ir_str, now, by, notes, group),
             )
         else:
             c.execute(
-                'INSERT INTO events ("group", title, theme, status, ir_json, '
-                "updated_at, updated_by, notes) VALUES (?,?,?,?,?,?,?,?)",
-                (group, title, theme, "pending", ir_str, now, by, notes or ""),
+                'INSERT INTO events ("group", title, theme, scene, status, ir_json, '
+                "updated_at, updated_by, notes) VALUES (?,?,?,?,?,?,?,?,?)",
+                (group, title, theme, scene, "pending", ir_str, now, by, notes or ""),
             )
     return group