Imported File Q&A, Specs Cleanup, and UI Tool Updates

This patch improves several core FriedrichAI workflows and cleans up a few rough edges from the latest tool updates.

Changed

• Improved imported file handling so Friedrich answers questions from imported .txt and .md files instead of dumping the raw file back into chat.

• Added /proofread and /spellcheck for quick spelling and grammar cleanup.

• Restored and improved /specs output with clearer hardware/tier information.

• Updated startup guidance with practical command examples for common tools.

• Added backend media availability flags so the interface can tell which optional media packs are installed.

• Updated quick actions: broader Creator/Troubleshoot tools replace narrower Steam Post/Support buttons.

• Improved media button handling for optional ImageGen, VideoGen, and AudioGen packs.

• Fixed duplicate startup “ready” messaging.

Notes
Optional media tools still require their matching installed packs. If a pack is missing, the related command will explain that instead of failing silently.

As always, FriedrichAI remains local-first: no cloud account, no API key, and no tracking.