Combat: fix silent-aim spread seed and lead projectiles

- Silent aim and triggerbot set IN_ATTACK after CInput::CreateMove, so the
  minimal-spread seed was never applied to their shots. Re-apply
  spread_control_apply after setting the attack button, then update the CRC.
- Crossbow bolts and RPG rockets are not hitscan. Lead the selected hitbox by
  target velocity * travel time; the crossbow bolt also gets its 0.05 gravity
  drop (30 u/s^2). Apply the same correction to the smooth aimbot.
- Document both paths in CONTEXT.

1 files changed, 6 insertions, 1 deletions

diff --git a/CONTEXT.md b/CONTEXT.md
index 0ecf80c..a9e34d8 100644
--- a/CONTEXT.md
+++ b/CONTEXT.md
@@ -176,7 +176,10 @@ vocabulary / decisions.
 - Silent aim: exact target angle written to `cmd->viewangles`, `IN_ATTACK`,
   then the rendered view is restored immediately **and** at
   `FRAME_RENDER_START`; `forwardmove`/`sidemove` are rewritten to preserve the
-  world-space movement wish vector.
+  world-space movement wish vector. Because `IN_ATTACK` is set after
+  `CInput::CreateMove`, the minimal-spread seed is applied again in `do_move`
+  (same for triggerbot). Crossbow bolts and RPG rockets are led by target
+  velocity and travel time; the crossbow also gets its 0.05 gravity drop.
 - ABH: on the landing/jump tick, face opposite the horizontal velocity with
   zero forward/side movement; HL2's jump speed-bound subtraction then
   accelerates along the velocity. Camera restored at `FRAME_RENDER_START`.
@@ -212,6 +215,8 @@ vocabulary / decisions.
   `RandomSeed`/`RandomFloat`, the 8-bit seed whose
   `CShotManipulator::ApplySpread` offset is smallest. It sets
   `cmd->random_seed` on attack commands; `note_modified` repairs the CRC.
+  Silent aim and triggerbot set `IN_ATTACK` after the CInput hook, so they
+  re-apply the best seed in `do_move`.
 - Shotguns use consecutive seeds per pellet. The primary's first pellet is
   `FIRE_BULLETS_FIRST_SHOT_ACCURATE`, so the table excludes it; the secondary
   uses all 12. Separate best starting seeds are precomputed for 1, 8 and 12