feat: DAO treasury, seasonal leaderboard, DEX swap routing, circuit breaker rollback (#981, #985, #988, #989)

[zainabbaba31-source]

zainabbaba31-source - Governance & Trading Features

Issues Addressed

Closes #981 - DAO Treasury

• Treasury deposit and withdrawal system
• Proposal creation with amount and recipient
• Voting mechanism (for/against)
• Time-locked execution after deadline

Closes #985 - Seasonal Leaderboard

• Season creation with start/end ledgers
• Prize pool allocation
• Win/loss/draw tracking
• Points system (3 points per win)

Closes #988 - DEX Swap Routing

• Route creation between token pairs
• Fee calculation in basis points
• Minimum output protection
• Optimal route marking

Closes #989 - Circuit Breaker Rollback Vote

• Community voting on pause/unpause
• Configurable vote threshold
• Automatic execution when threshold met
• Prevents double-voting

Changes Made

Contracts

• contracts/game_contract/src/lib.rs - Added all 4 features

Technical Details

DAO Proposal Flow

create_dao_proposal() → vote_on_dao_proposal() → execute_dao_proposal()

Season Points

points += 3; // Win
points += 0; // Loss
points += 1; // Draw

DEX Fee Calculation

fee = amount_in * fee_bips / 10000;
amount_out = amount_in - fee;

Circuit Breaker Execution

if votes_for >= threshold {
    if target_pause {
        env.storage().instance().set(&PAUSED, &true);
    } else {
        env.storage().instance().set(&PAUSED, &false);
    }
}

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