Healt Alert Tweaks

Healt Alert Tweaks - 1.21.2 - 1.21.4

Compatibility build for Minecraft 1.21.2 through 1.21.4.

Changed

• Updated Minecraft compatibility range.
• Updated Fabric API target for the 1.21.2+ compatibility line.
• Preserved the existing vignette rendering behavior.
• Preserved the existing heartbeat sound behavior.
• Preserved the existing Mod Menu configuration layout and options.

Technical

• Verified the same code path works across 1.21.2, 1.21.3, and 1.21.4.
• No gameplay behavior changes from the previous supported build.