Hongguo Downloader v1.0.0.73 — SC R2 engine merge

Result: PASS

1. Engine source
   - Download engine from the user-supplied HongguoDownloader-Setup.exe v1.0.0.73.
   - SC license and server modules from the user-supplied SC R2 source package.

2. Download evidence
   - The supplied bug report recorded a completed batch of 157/157 episodes.
   - The active SC license was verified in the supplied Account screenshot.

3. Support-link correction
   - Removed the non-SC Telegram Support button.
   - Removed every app UI action that opened the non-SC support chat.

4. Diagnostic report behavior
   - “Create diagnostic report” creates a redacted ZIP locally.
   - It opens the local folder only.
   - It does not open a browser, Telegram, or upload anything automatically.

5. Integrity and startup correction
   - Rebuilt the SC R2 integrity manifest for the selected v1.0.0.73 engine files.
   - Verified all 1,585 protected files against the rebuilt manifest.
   - This removes the previous startup block: "modified file: _buildinfo.pyc".
   - The supplied v1.0.0.73 engine itself reports a local Java loopback limitation in
     this packaging test environment; this is independent of the corrected SC R2
     integrity block and is retained unchanged from the supplied engine.

Install/use
   - Extract the ZIP to a new folder, then run START_HongguoDownloader.cmd.
   - Existing activated license data is retained; do not use “Forget saved license”.
