리펙토링: 전체 구조 검토, 개선

src/main/ipc/files.js

@@ -1,6 +1,7 @@
 const { ipcMain } = require('electron');
 const path = require('path');
 const fs = require('fs');
+const crypto = require('crypto');
 
 const EXTS = new Set(['.jpg', '.jpeg', '.png', '.gif', '.bmp', '.tiff', '.tif', '.webp', '.heic', '.heif']);
 
@@ -12,7 +13,7 @@ function register() {
         .map(f => {
           const fullPath = path.join(folderPath, f);
           const stat = fs.statSync(fullPath);
-          return { name: f, path: fullPath, mtime: stat.mtimeMs, size: stat.size };
+          return { name: f, path: fullPath, mtime: stat.mtimeMs };
         })
         .sort((a, b) => a.name.localeCompare(b.name, 'ko'));
       return files;
@@ -78,7 +79,7 @@ function register() {
     for (let i = 0; i < files.length; i++) {
       const src = files[i].path;
       const ext = path.extname(files[i].name).toLowerCase();
-      const tmp = path.join(folderPath, `__tmp_rename_${i}_${Date.now()}${ext}`);
+      const tmp = path.join(folderPath, `__tmp_${crypto.randomUUID()}${ext}`);
       try {
         fs.renameSync(src, tmp);
         tmpMap.push({ tmp, ext, idx: i });

src/main/ipc/folder.js

@@ -53,7 +53,7 @@ function register(mainWindow) {
           return { name: e.name, path: fullPath, hasChildren };
         })
         .sort((a, b) => a.name.localeCompare(b.name));
-    } catch { return []; }
+    } catch { return null; }
   });
 
   ipcMain.handle('reveal-folder', (_e, folderPath) => shell.openPath(folderPath));