Fix reported interface and sound issues

[vtm9]

Summary

Fix nine reported usability and gameplay issues across authentication, settings, the lobby, profiles, and the game room.

• make password-reset confirmation and dark-theme dropdown options readable
• constrain the Join Game table and game-room controls to responsive layouts
• keep activity heatmap month labels clear of contribution cells
• apply newly saved sound settings immediately without requiring a reload
• map :) and :( to the correct emoji search results
• add regression coverage for password-reset feedback, sound changes, and emoticons

Root causes

Several components combined Bootstrap fixed/minimum widths with mobile layouts, the Join Game sizing class was attached to the modal content while its CSS targeted the dialog, and native/custom dropdown states did not consistently inherit dark-theme colors. Sound settings were captured once when the module loaded, so later saves could not affect playback. Emoji lookup searched punctuation directly and returned ambiguous fuzzy matches.

Validation

• make test — 1,350 tests passed; 9 skipped; 45 excluded
• mix credo --strict
• mix dialyzer
• mix format --check-formatted
• pnpm run check
• pnpm run test — 100 tests passed
• pnpm run build

Fixes #2313
Fixes #2304
Fixes #2302
Fixes #2301
Fixes #2294
Fixes #2291
Fixes #2288
Fixes #2285
Fixes #2281