Code review: Fix critical bugs and remove duplicate assets

[Copilot]

Code review identified critical bugs in win condition logic, duplicate media files, and unoptimized assets across three minigames (musicas_da_comp, changefast, gamuto_snap).

Issues Found

Critical:

• Hardcoded win bypass in musicas_da_comp/main.gd:116 - Special-cased answers "O Saia" and "*respira*" always trigger win, breaking validation logic
• 33MB+ of oversized images - VDC_ORGULHOSO.png (17M) and VDC_TE_PERDOA.png (16M) need compression
• Duplicate audio files - .mpeg files exist alongside .ogg conversions in musicas_da_comp/recursos/sons/
• Source file leak - Untitled.xcf (3.6MB GIMP file) committed to production

Code Quality:

• Variable shadowing in changefast/main.gd - senha declared at both line 29 and 71
• Dead code blocks remain commented out (lines 14-22 in changefast)
• Inefficient visibility toggle pattern (lines 105-120) should use dictionary lookup

# Current problematic code:
if(musica_Escolhida.get(pergunta_escolhida)[0] == pergunta.text) || pergunta.text == "O Saia" || pergunta.text == "*respira*":
    emit_signal("win")

# Should be:
if musica_Escolhida.get(pergunta_escolhida)[0] == pergunta.text:
    emit_signal("win")

Positive: Asset cleanup in changefast removed unused images/audio, proper signal architecture for win/lose conditions.

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