fix: fix uniswap integration and add swap type support with Uniswap exact-output and slippage controls

[ggonzalez94]

Summary

• add swap quote --type with exact-input|exact-output (default exact-input)
• add exact-output amount flags: --amount-out / --amount-out-decimal
• add trade_type to swap quote rows
• implement Uniswap exact-output support and keep exact-input as default
• keep --slippage-pct for Uniswap, and now fail fast for other providers to avoid silent ignores
• add provider gating for unsupported swap types (1inch, jupiter, fibrous, bungee remain exact-input only)
• update README, AGENTS, changelog, and Mintlify swap docs/reference/concepts

Validation

• go test ./...
• go test -race ./...
• go vet ./...
• cd docs && npx --yes mint@4.2.378 validate
• cd docs && npx --yes mint@4.2.378 broken-links

Smoke checks

• Uniswap exact-input quote succeeds
• Uniswap exact-output quote succeeds with both --amount-out and --amount-out-decimal
• exact-output with non-Uniswap providers returns unsupported (exit code 13)
• invalid type/amount/slippage combinations return usage errors (exit code 2)

---

Note

Medium Risk
Touches swap quote request/response schema and provider integrations (notably Uniswap), which can affect automation consumers and quote correctness; changes are well-covered by new unit tests but still impact a core CLI path.

Overview
Adds swap quote trade-type support via --type exact-input|exact-output plus exact-output amount flags (--amount-out, --amount-out-decimal), and returns trade_type on all swap quote rows.

Updates CLI routing/validation so EVM exact-output defaults to uniswap (Solana exact-output rejected), enforces --slippage-pct as a Uniswap-only manual override, and incorporates these inputs into the swap quote cache key.

Fixes the Uniswap Trade API integration by sending required fields (swapper, autoSlippage/slippageTolerance) and handling string-encoded gas USD fields; other providers now explicitly reject non-exact-input requests. Docs/README/CHANGELOG are updated and extensive provider/runner tests were added for new behaviors.

^{Written by Cursor Bugbot for commit 0f4db41. This will update automatically on new commits. Configure here.}

[chatgpt-codex-connector]

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