feat(ui): redesign public reading and complete glass workspace

Add scoped public navigation, reading progress, focus and print controls without loading the editor. Polish responsive settings, graph and media layouts.

Correct share expiry units, preserve math and code during link maintenance, and normalize Markdown destinations for templates and note navigation. Verify browser flows and document the new tools.

internal/api/openapi.json

@@ -732,7 +732,7 @@
           {
             "name": "note",
             "in": "query",
-            "required": true,
+            "required": false,
             "description": "所属笔记路径",
             "schema": {
               "type": "string"
@@ -792,7 +792,8 @@
               }
             }
           }
-        }
+        },
+        "description": "note 与 folder 必须且只能指定一个；note 上传到笔记附件目录，folder 上传到目录的 assets 子目录。"
       }
     },
     "/assets/import": {