feat: 组合订阅和文件的导出导入

backend/package.json

@@ -1,6 +1,6 @@
 {
   "name": "sub-store",
-  "version": "2.15.11",
+  "version": "2.15.12",
   "description": "Advanced Subscription Manager for QX, Loon, Surge, Stash and ShadowRocket.",
   "main": "src/main.js",
   "scripts": {

backend/src/restful/collections.js

@@ -50,11 +50,21 @@ function createCollection(req, res) {
 
 function getCollection(req, res) {
     let { name } = req.params;
+    let { raw } = req.query;
     name = decodeURIComponent(name);
     const allCols = $.read(COLLECTIONS_KEY);
     const collection = findByName(allCols, name);
     if (collection) {
-        success(res, collection);
+        if (raw) {
+            res.set('content-type', 'application/json')
+                .set(
+                    'content-disposition',
+                    `attachment; filename="${encodeURIComponent(name)}.json"`,
+                )
+                .send(JSON.stringify(collection));
+        } else {
+            success(res, collection);
+        }
     } else {
         failed(
             res,

backend/src/restful/file.js

@@ -197,11 +197,21 @@ async function getFile(req, res) {
 }
 function getWholeFile(req, res) {
     let { name } = req.params;
+    let { raw } = req.query;
     name = decodeURIComponent(name);
     const allFiles = $.read(FILES_KEY);
     const file = findByName(allFiles, name);
     if (file) {
-        success(res, file);
+        if (raw) {
+            res.set('content-type', 'application/json')
+                .set(
+                    'content-disposition',
+                    `attachment; filename="${encodeURIComponent(name)}.json"`,
+                )
+                .send(JSON.stringify(file));
+        } else {
+            success(res, file);
+        }
     } else {
         failed(
             res,