feat: add #[derive(FieldRegistry)] to all task entity structs

Apply FieldRegistry to every #[repr(C)] struct under task/:
CTaskMine, CTaskOilDrum, CTaskCrate, CTaskCloud, CTaskFilter,
CTaskFire, CTaskTeam, CTaskTurnGame, TurnGameCtx, BitGrid,
BungeeTrailTask, WeaponAimTask.

All entity types now have auto-generated field maps available in the
global registry, so the debug UI's raw memory view labels every known
field automatically.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

crates/openwa-core/src/task/bit_grid.rs

@@ -2,10 +2,12 @@
 
 use crate::rebase::rb;
 use crate::wa_alloc::wa_malloc;
+use crate::FieldRegistry;
 
 /// Bitfield grid buffer used for spatial collision/visibility queries.
 /// Vtable at 0x6640EC (shared with DisplayGfx base).
 /// Size: 0x2C bytes (11 u32 fields).
+#[derive(FieldRegistry)]
 #[repr(C)]
 pub struct BitGrid {
     pub vtable: u32,

crates/openwa-core/src/task/cloud.rs

@@ -1,5 +1,6 @@
 use super::base::CTask;
 use crate::fixed::Fixed;
+use crate::FieldRegistry;
 
 /// Airstrike / weather cloud task.
 ///
@@ -17,6 +18,7 @@ use crate::fixed::Fixed;
 ///
 /// Source: Ghidra decompilation of 0x5482E0 (constructor) and
 ///         0x5484C0 (HandleMessage update + render branches).
+#[derive(FieldRegistry)]
 #[repr(C)]
 pub struct CTaskCloud {
     /// 0x00–0x2F: CTask base

crates/openwa-core/src/task/filter.rs

@@ -1,4 +1,5 @@
 use super::base::CTask;
+use crate::FieldRegistry;
 
 /// Message-subscription filter task — routes messages selectively to child tasks.
 ///
@@ -31,6 +32,7 @@ use super::base::CTask;
 ///   and optionally 0x0E (if `GameInfo+0xD778 < -1`)
 /// - `CTaskTeam__CreateWeatherFilter` (0x552960): subscribes to 1, 2, 3, 0x54, then
 ///   spawns `CTaskCloud` children using randomised positions (only if `DDGame+0x777C == 0`)
+#[derive(FieldRegistry)]
 #[repr(C)]
 pub struct CTaskFilter {
     /// 0x00–0x2F: CTask base.

crates/openwa-core/src/task/fire.rs

@@ -1,4 +1,5 @@
 use super::base::CTask;
+use crate::FieldRegistry;
 
 /// Fire/flame entity task.
 ///
@@ -11,6 +12,7 @@ use super::base::CTask;
 /// at 0xFFFF and counts down each frame; when it reaches zero the fire
 /// dies.  `lifetime` at +0xB1 is a signed byte: 0xFF (= -1i8) means alive,
 /// 0 means the task is being destroyed.
+#[derive(FieldRegistry)]
 #[repr(C)]
 pub struct CTaskFire {
     /// 0x00-0x2F: CTask base

crates/openwa-core/src/task/mine_oil_drum.rs

@@ -1,4 +1,5 @@
 use super::game_task::CGameTask;
+use crate::FieldRegistry;
 
 /// Land mine entity task.
 ///
@@ -10,6 +11,7 @@ use super::game_task::CGameTask;
 ///
 /// Source: Ghidra decompilation of 0x506660 (constructor) and
 ///         0x5072E0 (HandleMessage, msg 2/0x15/0x1C/0x4B branches).
+#[derive(FieldRegistry)]
 #[repr(C)]
 pub struct CTaskMine {
     /// 0x00–0xFB: CGameTask base (pos at 0x84/0x88, speed at 0x90/0x94)
@@ -45,6 +47,7 @@ const _: () = assert!(core::mem::size_of::<CTaskMine>() == 0x128);
 ///
 /// Source: Ghidra decompilation of 0x504AF0 (constructor) and
 ///         0x5050B0 (HandleMessage, msg 2/0x1C branches).
+#[derive(FieldRegistry)]
 #[repr(C)]
 pub struct CTaskOilDrum {
     /// 0x00–0xFB: CGameTask base (pos at 0x84/0x88, speed at 0x90/0x94)

crates/openwa-core/src/task/overlays.rs

@@ -1,6 +1,7 @@
 use super::base::CTask;
 use super::game_task::{CGameTask, SoundEmitter};
 use crate::fixed::Fixed;
+use crate::FieldRegistry;
 
 /// Bungee trail rendering task fields.
 ///
@@ -9,6 +10,7 @@ use crate::fixed::Fixed;
 /// offsets for different purposes.
 ///
 /// Cast a task pointer to this type when you know it's a bungee trail task.
+#[derive(FieldRegistry)]
 #[repr(C)]
 pub struct BungeeTrailTask {
     /// 0x00-0x2F: CTask base
@@ -47,6 +49,7 @@ const _: () = assert!(core::mem::size_of::<BungeeTrailTask>() == 0xFC);
 /// class region beyond CGameTask (0xFC). The exact class name is unknown.
 ///
 /// Cast a task pointer to this type when you know it's a worm/weapon aiming task.
+#[derive(FieldRegistry)]
 #[repr(C)]
 pub struct WeaponAimTask {
     /// 0x00-0xFB: CGameTask base

crates/openwa-core/src/task/supply_crate.rs

@@ -1,4 +1,5 @@
 use super::game_task::CGameTask;
+use crate::FieldRegistry;
 
 /// Weapon/health/utility crate entity task.
 ///
@@ -13,6 +14,7 @@ use super::game_task::CGameTask;
 /// param_3 into offset 0x110, making the crate carry its full configuration.
 ///
 /// Source: Ghidra decompilation of 0x502490, wkJellyWorm CTaskCrate.h
+#[derive(FieldRegistry)]
 #[repr(C)]
 pub struct CTaskCrate {
     /// 0x00–0xFB: CGameTask base (pos at 0x84/0x88, speed at 0x90/0x94)

crates/openwa-core/src/task/team.rs

@@ -1,5 +1,6 @@
 use super::base::CTask;
 use crate::fixed::Fixed;
+use crate::FieldRegistry;
 
 /// Per-team state-tracker task — one instance per team, child of CTaskTurnGame.
 ///
@@ -18,6 +19,7 @@ use crate::fixed::Fixed;
 ///   - `_item_slots[0..99]` at +0x88: up to 100 weapon/item IDs loaded from scheme
 ///   - `worm_count` at +0x218: number of CTaskWorm children constructed (1-indexed)
 ///   - SharedData node (0x30 bytes) registered with key = (team_index, type=0x15)
+#[derive(FieldRegistry)]
 #[repr(C)]
 pub struct CTaskTeam {
     /// 0x00–0x2F: CTask base (vtable, parent, children, shared_data, ddgame, …)

crates/openwa-core/src/task/turn_game.rs

@@ -1,5 +1,6 @@
 use super::base::CTask;
 use crate::fixed::Fixed;
+use crate::FieldRegistry;
 
 /// Embedded intermediate game-context sub-object within `CTaskTurnGame`.
 ///
@@ -25,6 +26,7 @@ use crate::fixed::Fixed;
 /// either constructor; they appear to be set by `FUN_005514d0` or similar
 /// helpers called later. Observed runtime values: +0xA0 = 15, +0xA4/+0xA8
 /// are heap pointers.
+#[derive(FieldRegistry)]
 #[repr(C)]
 pub struct TurnGameCtx {
     /// +0x00 (= CTaskTurnGame+0x30): Secondary interface vtable pointer.
@@ -91,6 +93,7 @@ const _: () = assert!(core::mem::size_of::<TurnGameCtx>() == 0xAC);
 ///   [3] 0x5612E0 — HUD data query (responds to msg 0x7D3)
 ///
 /// All timers decrement by 20 ms per frame (= 1000 ms / 50 fps).
+#[derive(FieldRegistry)]
 #[repr(C)]
 pub struct CTaskTurnGame {
     /// 0x00-0x2F: CTask base (vtable, parent, children, shared_data, ddgame, …)