Test v1.0.0-001 on a real Minecraft 26.2 client

[mrfloris]

Checklist

• Confirm the client starts with Fabric Loader 0.19.3 and Fabric API 0.154.2+26.2.
• Confirm the overlay is off after startup.
• Press F9 near a source pool and confirm source and flowing markers appear.
• Hold Shift and press F9, then confirm a fresh scan completes.
• Check radius 1 and radius 2 behavior in the settings screen.
• Check include or exclude waterlogged sources.
• Confirm through-wall visibility stays off unless deliberately enabled and allowed by the server.
• Check Mod Menu and F10 open the same settings screen.

Please report the Minecraft version, loader, API, mod build, settings, reproduction steps, and a redacted log if anything fails.