Merge pull request #250 from Gnathonic/feat/filesystem-provider

feat: OneDrive and Local Folder sync providers + Google Drive re-auth overhaul

Author: Gnathonic

.env.example

@@ -0,0 +1,7 @@
+# Google Drive sync (optional — omit to disable)
+VITE_GDRIVE_CLIENT_ID=
+VITE_GDRIVE_API_KEY=
+
+# OneDrive sync (optional — omit to hide the OneDrive option)
+# Azure AD app registration with the deploy origin as an SPA redirect URI.
+VITE_ONEDRIVE_CLIENT_ID=

CLAUDE.md

@@ -250,14 +250,21 @@ Night mode applies a CSS `filter` to `<dialog>` elements (see `app.html`). The `
 
 ## Environment Variables
 
-Create a `.env.local` file for Google Drive integration:
+Create a `.env.local` file for cloud provider integration:
 
 ```
 VITE_GDRIVE_CLIENT_ID=your_client_id
 VITE_GDRIVE_API_KEY=your_api_key
+VITE_ONEDRIVE_CLIENT_ID=your_azure_app_client_id
 ```
 
-These are only required for Google Drive sync. MEGA and WebDAV don't require env vars.
+- `VITE_GDRIVE_*`: required only for Google Drive sync.
+- `VITE_ONEDRIVE_CLIENT_ID`: required only for OneDrive sync. Register an
+  Azure AD app (any Microsoft account tenant, "common" authority) and add the
+  deploy origin as a **Single-page application** redirect URI. Scopes used:
+  `Files.ReadWrite`, `offline_access`, `User.Read`. When unset, the OneDrive
+  option is hidden from the cloud screen.
+- MEGA, WebDAV, and Local Folder require no env vars.
 
 ## Testing
 

README.md

@@ -183,13 +183,18 @@ npm test
 
 ### Environment Variables
 
-For Google Drive integration, create a `.env` file:
+For Google Drive and/or OneDrive integration, create a `.env` file:
 
 ```env
 VITE_GDRIVE_CLIENT_ID=your_client_id
 VITE_GDRIVE_API_KEY=your_api_key
+VITE_ONEDRIVE_CLIENT_ID=your_azure_app_client_id
 ```
 
+For OneDrive, register an Azure AD app ("common" authority) and add your deploy
+origin as a **Single-page application** redirect URI. When unset, the OneDrive
+option is hidden. MEGA, WebDAV, and Local Folder need no configuration.
+
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