Rage and the tail-cut gate as behaviour blocks

[sp00ktober]

Phase 4 of the moveset editor: rage and the tail cut become building blocks. Stacked on #66.

• Effects:
  • Enrage: sets FLAGS 0x400 unless the monster is enraged; the engine runs its own rage start on the next AI frame, roar included.
  • Calm down: sets RAGE_TIMER = 1 while enraged; the engine runs its own rage end.
  • Lua: port:enrage() and port:calm(), queued on the board and applied by the brain.
• The tail-cut gate:
  • [parts.tail] sever_below = 50 lets the tail be cut only below 50 % HP, set from the Parts dock.
  • It wraps the species' cut gate (OBJ_VTABLE.CUT_GATE, vt+0xE0, the same gate that holds Akantor's tail until 25 %), refuses above the line, and still calls the native gate below it.
  • A refused cut puts the counter back to 1, so the tail keeps flinching and taking damage, and the first cutting hit below the line cuts.
• Natural rage: [behaviour] natural_rage = false (a Behaviour dock checkbox) raises ANGER_THRESHOLD to 32767 once per monster, and turning it back on restores the species value.
• Framework API 5:
  • mhfu.em_sever_gate, em_natural_rage, em_rage;
  • addresses.toml gains RAGE_START, RAGE_END, ANGER_ADD, the rage fields and CUT_GATE.
• The Zinogre demo:
  • The 2nd flinch → charge up, then enrage as the charge ends, so the native roar follows it.
  • The tail can only be cut below 50 %.

Live, lane 3 (native Tigrex for the levers, the Zinogre for the rest):

• Enrage and calm land within one AI frame, with the enraged and calmed events.
• A second enrage does not restart the timer.
• The gate refused 3 cuts at 52–97 % HP and cut on the hit that crossed 50 %, on 2 monsters.
• Natural rage off: +2520 anger with no rage, and back on, rage again.
• The charge plays 121 of 125 frames, then the roar.
• A 191 s soak with no crash.

Tests: 2985 passed with game data on macOS; CI's test job passes on Linux 3.11 and 3.14 (2397 passed).

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