Greptile Summary

This PR fixes a bug where bare IPv6 literals (e.g. ::1) entered as the manual gateway host produced invalid URLs like http://::1:18789 instead of the RFC-correct http://[::1]:18789. The fix adds a normalization step in composeGatewayManualUrl that wraps raw IPv6 hosts in brackets, with two new tests covering the direct URL composer and the full resolveGatewayConnectConfig flow. The logic is correct — parseGatewayEndpointResult already strips brackets via uri.host?.trim('[', ']'), so GatewayConnectConfig.host continues to store the bare address without brackets as expected.

Confidence Score: 5/5

Safe to merge — the fix is correct, well-scoped, and the new tests pass through the full resolution path.

The normalization logic correctly handles all three cases (already-bracketed, raw IPv6, and non-IPv6), and the downstream parser already strips brackets before storing the host. No P0/P1 issues found; all remaining observations are P2 or lower.

No files require special attention.

_{Reviews (1): Last reviewed commit: "fix(android): normalize IPv6 host input ..." | Re-trigger Greptile}