Sync workflow, asst extra input, excel + ppt support and modal updates

backend/package-lock.json

@@ -7,7 +7,6 @@
     "": {
       "name": "mike-backend",
       "version": "1.0.0",
-      "license": "AGPL-3.0-only",
       "dependencies": {
         "@anthropic-ai/sdk": "^0.90.0",
         "@aws-sdk/client-s3": "^3.787.0",
@@ -29,6 +28,7 @@
         "multer": "^1.4.5-lts.2",
         "pdfjs-dist": "^4.10.38",
         "resend": "^4.5.1",
+        "xlsx": "https://cdn.sheetjs.com/xlsx-0.20.3/xlsx-0.20.3.tgz",
         "zod": "^3.25.76"
       },
       "devDependencies": {
@@ -5473,6 +5473,18 @@
         }
       }
     },
+    "node_modules/xlsx": {
+      "version": "0.20.3",
+      "resolved": "https://cdn.sheetjs.com/xlsx-0.20.3/xlsx-0.20.3.tgz",
+      "integrity": "sha512-oLDq3jw7AcLqKWH2AhCpVTZl8mf6X2YReP+Neh0SJUzV/BdZYjth94tG5toiMB1PPrYtxOCfaoUCkvtuH+3AJA==",
+      "license": "Apache-2.0",
+      "bin": {
+        "xlsx": "bin/xlsx.njs"
+      },
+      "engines": {
+        "node": ">=0.8"
+      }
+    },
     "node_modules/xml": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/xml/-/xml-1.0.1.tgz",