[Flapjacck]

Add XYZ Offsets and Tilt Controls for Held Item & Bare Hand

Summary

Adds full positional offset (X, Y, Z) and tilt (Pitch, Roll) controls for both the held item model and the bare hand (empty-handed arm) in first-person view. Item and arm transforms are now independent of each other. Also fixes a slider display bug where negative values were clamped to 0.10 on the track label, and fixes edit box truncation for values longer than 4 characters.

Changes

ItemTweaksConfig.java

• Added HELD_ITEM_OFFSET_X/Y/Z — positional offsets for the held item (range -1.0 to 1.0)
• Added ITEM_TILT_PITCH / ITEM_TILT_ROLL — X and Z rotation for the held item (range -90 to 90°)
• Added ARM_OFFSET_X/Y/Z — separate positional offsets for the bare arm (range -1.0 to 1.0)
• Added ARM_TILT_PITCH / ARM_TILT_ROLL — X and Z rotation for the bare arm (range -90 to 90°)
• Added TILT_MIN, TILT_MAX, DEFAULT_TILT constants and clampTilt() method
• All new values persist to config/swing.json and reset via the Reset button

ItemInHandRendererMixin.java

• Applies held item transform in order: translate (offset) → rotate (pitch, then roll) → scale
• Rotations use Axis.XP and Axis.ZP from com.mojang.math.Axis

ItemInHandRendererArmMixin.java

• Switched from shared HELD_ITEM_OFFSET_* to the new separate ARM_OFFSET_* fields
• Added ARM_TILT_PITCH and ARM_TILT_ROLL rotations to both renderRightHand and renderLeftHand
• All arm transforms remain gated behind APPLY_HAND_SCALE (no effect while holding an item)

SwingSettingsScreen.java

• Bug fix: FloatSlider label rendering now uses Mth.clamp(toFloat(), min, max) instead of ItemTweaksConfig.clamp(), so negative offset and tilt values display correctly on the track
• Bug fix: Edit box maxLength increased from 4 to 6 to accommodate values like -1.00 and -45.00
• Six scrollable sections: Swing Speed, Held Item Scale, Item Offsets, Item Tilt, Arm Offsets, Arm Tilt
• Each section has a slider + numeric input box per axis; scroll area expands to 292px of travel
• FloatSlider now accepts explicit min/max so offset and tilt sliders use their own range

Testing

• Verified ./gradlew build succeeds with no errors
• Confirmed all new values persist across sessions via config/swing.json
• Reset button correctly zeroes all offset and tilt fields

UI Changes

• GUI panel size unchanged; new controls scroll into view below existing ones
• New sections in scroll order: Item Offsets (X/Y/Z) → Item Tilt (Pitch/Roll) → Arm Offsets (X/Y/Z) → Arm Tilt (Pitch/Roll)
• Arm offset and tilt controls only take effect when Apply Hand Scale is ON