fix(jeu-de-la-grue): improve UI layout and interactions

[Animation-EdNum]

Fixed UI issues reported by the user for the jeu_de_la_grue webapp.

• Modified .program-strip with flex-wrap: wrap and adjusted wrapper height so long programs expand vertically rather than breaking the layout horizontally.
• Redefined .instruction-btn colors so the text matches the button color, and replaced the unreadable light-yellow hover state with subtle, accessible background colors in both light and dark modes.
• Fixed dark mode so the instruction buttons retain their specific colored borders instead of defaulting to gray.
• Corrected the action button's dynamic icon logic to visually toggle between hand-fist (grabbing) and hand-holding (dropping). Re-ran FontAwesome subset generation after declaring the hidden hand-holding icon to ensure it renders properly.

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PR created automatically by Jules for task 1590904820656594199 started by @Animation-EdNum

[google-labs-jules]

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