feat: Update manifest to add acceptFromFlagship

- Also add placeholder route that will handle mobile uploads later

src/drive/targets/manifest.webapp

@@ -175,5 +175,12 @@
       "verbs": ["POST"],
       "description": "Remote-doctype required to send anonymized measures to the DACC shared among mycozy.eu's Cozy."
     }
+  },
+  "accept_from_flagship": true,
+  "accept_documents_from_flagship": {
+    "accepted_mime_types": ["*/*"],
+    "max_number_of_files": 1,
+    "max_size_per_file_in_MB": 10,
+    "route_to_upload": "/#/create?fromFlagshipUpload=true"
   }
 }

src/drive/web/modules/navigation/AppRoute.jsx

@@ -26,6 +26,7 @@ import SearchView from '../views/Search/SearchView'
 import OnlyOfficePaywallView from '../views/OnlyOffice/OnlyOfficePaywallView'
 import FilesViewerRecent from '../views/Recent/FilesViewerRecent'
 import { ShareDisplayedFolderView } from 'drive/web/modules/views/Modal/ShareDisplayedFolderView'
+import { CreateFromFlagship } from '../views/Upload/UploadFromFlagship'
 
 const FilesRedirect = () => {
   const { folderId } = useParams()
@@ -39,6 +40,7 @@ const AppRoute = () => (
       {__TARGET__ === 'mobile' && (
         <Route path="uploadfrommobile" element={<UploadFromMobile />} />
       )}
+      <Route path="create" element={<CreateFromFlagship />} />
       <Route path="/files/:folderId" element={<FilesRedirect />} />
       <Route path="/" element={<Index />} />
 

src/drive/web/modules/views/Upload/UploadFromFlagship.jsx

@@ -0,0 +1,13 @@
+import React from 'react'
+import { useUploadFromFlagship } from './useUploadFromFlagship'
+
+export const UploadFromFlagship = () => {
+  const { loading } = useUploadFromFlagship()
+
+  return (
+    <div>
+      <h1>Upload From Flagship Page</h1>
+      <p>{loading ? 'loading' : 'Ready to call hasFilesToHandle'}</p>
+    </div>
+  )
+}

src/drive/web/modules/views/Upload/useUploadFromFlagship.js

@@ -0,0 +1,20 @@
+import { useSearchParams } from 'react-router-dom'
+import { useWebviewIntent } from 'cozy-intent'
+import { useEffect, useState } from 'react'
+
+export const useUploadFromFlagship = () => {
+  const [loading, setLoading] = useState(true)
+  const [searchParams] = useSearchParams()
+  const webviewIntent = useWebviewIntent()
+  const fromFlagshipUpload = searchParams.get('fromFlagshipUpload')
+
+  useEffect(() => {
+    if (fromFlagshipUpload && webviewIntent) {
+      setLoading(false)
+    }
+  }, [fromFlagshipUpload, webviewIntent])
+
+  return {
+    loading
+  }
+}