Paperless NGX Uploader

Paperless‑NGX Uploader uploads single or multiple documents to Paperless‑NGX directly from the system Share menu. This project updates and adapts the original “Paperless Share” by qcasey to modern Android versions while keeping the same simple “share and upload” workflow.

Features:

• Android native Share Intent integration (one action = one file).
• Paperless‑NGX server configuration (URL), username and password.
• Secure credential storage with automatic recovery on startup.
• Connection test with feedback (success, invalid credentials, unreachable host).
• Tag management:
  • Fetches tags from Paperless‑NGX after a valid connection.
  • Tag selection dialog with search/filter.
  • Option to set default tags for uploads.
  • Selected tags are persisted and restored on startup.
• Uploads the shared document with the configured/default tags.
• Upload status indicator; on failure, a Snackbar notifies the user.
• On success, the app returns to background.

What's New in 1.8.5

Highlights:
• Client certificates (mTLS) — present a per-server certificate, with an optional custom CA, to reverse proxies that require mutual TLS (#19).
• "Open with" — send documents from other apps directly to the uploader.
• Unreadable shared files are reported instead of being silently skipped.

Other improvements:
• Editing a server no longer discards its other settings, tags or headers.
• Shared and "Open with" files are no longer uploaded twice after the app is recr