ColonyLink v1.6.4 <> Cancel requests + tool substitution control

New

• Cancel Request button. A small red "×" now sits in the top-right of the Priority Request line. Click it to cancel that builder's current priority request through MineColonies' request system — just like cancelling from the builder's own GUI (the colony may re-create the request later). Hover shows "Cancel this request".
• Tool substitution is now Priority-Request-only by default. When ColonyLink upgrades a requested tool to the best available, it now does so only on the Priority Request line — the resource list shows and sends exactly what the builder asked for. A new server config option, [tools] tool_substitution_in_list, lets you restore the old behavior (substitute in the list too) if you prefer.

Fixed

• Priority Request no longer loops in the default delivery mode. Fulfilling a builder's priority request (a tool, armor, or food when they get low on saturation) now marks the line "Sent" and disables the button until it's delivered — instead of staying clickable and draining your ME network on repeat clicks. This worked in WAREHOUSE mode already; it now works in the default BUILDER mode too.
• Requests that were shown on the Priority line but refused with a "not needed" message (some tools and food) now send correctly.

Notes

• Broad server-side stability and validation pass continues from v1.6.2.
• Multiplayer: run the same version on client and server. The default builder flow is unchanged — existing setups keep working as before.

📄 Full technical changelog (all versions, for developers): Github

Translations (EN/FR/ES/RU/ZH) are written by Claude and may be imperfect — corrections welcome on GitHub or Discord.