Make #lounge the Home room and fail open CLI audio

[mpiorowski]

Summary

• Renames the canonical Home chat room from #general to #lounge across database constraints, chat services, moderation guards, dashboard rendering, help copy, and project context.
• Lets the late CLI continue into SSH when local audio startup or output fails, reporting Icecast availability so a paired browser can take over playback.

Changes

• Adds migration 074_rename_general_room_to_lounge.sql to convert the permanent auto-join room to kind/slug = lounge.
• Routes News announcements, bot posts, Home dashboard chrome, room ordering, search/mod copy, and reserved-room protections through #lounge.
• Deletes generated News announcement chat cards when an article is deleted and sends a silent removal event to active chat views.
• Uses Unicode display width for markdown/chat wrapping and padding to avoid wide-glyph terminal overflow.
• Adds browser Icecast fallback when a paired CLI reports icecast_output_available=false.
• Adds small TUI QoL fixes for Artboard help close, Shop h/l subtab navigation, Minesweeper chord preview/accounting, and Nonogram active clue styling.

Behavior notes

• Migration aborts if a #lounge room already exists before renaming #general.
• Older paired clients remain compatible because missing icecast_output_available defaults to true.
• CLI audio failures no longer block SSH access; affected users need browser pairing for audio playback.

Feature flags

• None

Screenshots / Video

• Not included in this draft; attach before review.

Testing

• Automated: Added/updated unit coverage for lounge room behavior, Unicode-width wrapping, Artboard help close, and browser Icecast fallback; added integration coverage for deleting News announcement chat messages. Not run per repo policy.
• Manual: Not run; verification should cover migration, Home #lounge rendering, article deletion cleanup, CLI no-audio startup, browser audio takeover, and affected TUI controls.