feat: hybrid ports wave 2: studio clips, walking, hit push, every clip in game, engine walls

[sp00ktober]

Wave 2 of hybrid ports: clips named and played from the studio, walking and area changes by named points, live hit-table pushes, every Zinogre clip measured in the game, and the engine's wall, movement, spawn and reaction functions. For sp00ktober/MHFU-ModKit#97, #98, #99, #100, #101.

• Clips in the studio (studio, mhfu-port): every donor clip by MHP3rd id, previewed (also those no entry holds), named and placed; a name pins nothing ([clips.x] with source only), a placement pins and swaps, undo works, the manifest round-trips. Play in game holds the clip's entry through mhfu.live.clips (3/3 body parts, ~3.5 s, measured live).
• Packing (mhfu-port): every donor id under the host's entry count goes to its own entry, so 100–122 carry the odd streams (the Tigrex's brain asks for them). Zinogre: 20 stream-1 clips in 100–122, the four stream-2 clips in 50/53/55/56.
• Every clip in the game (mhfu clips ride|play|sweep|release, cli_bridge.lua): cold boot with a port riding the Tigrex, hold each entry, read every part's clip block. Zinogre 102/102 on every part (re-measured after the merge), Brute 77/77.
• Walking (mhfu rig goto|walk, mhfu.points, studio Point tool and Points panel): named points in map.toml; goto changes area by a GameTask request in ~2 s (camp → section 8: 15/15). walk routes over every stage's collision from the extracted files, with climbs (material 9/10 walls and roots), ledges and drops: camp → section 8, → section 3 and → section 7 through section 2, each 3/3. Departure press no longer loses ~12 s.
• Hit push (studio port push, Push to game): one write plan for hurtboxes, grid and hitboxes, with guard bytes; the Lua module carries the same plan as data. Read-back 0.03–0.22 s; on the native Tigrex the charge's damage halved with its power (72 → 36 HP).
• Engine functions (addresses.toml, mhfu observe): wall contact and the stuck state, position/yaw/ground writers, the attack spawner (callable from the debugger), the reaction check; trace() now flushes the JIT so every armed breakpoint fires.
• Lanes: the memory stick (inject, studio) follows MHFU_LANE; a lane hides its window once it listens.
• Shared: mhfu.entries (MIT, stdlib only) owns the entry arithmetic mhfu-port and the live tools use; ENTITY.PREV_MAIN/SUB are TICK_MAIN/SUB, the pair the action tick last ran.

Tests: 2124 passed, 45 skipped (GL, Blender, live), with both games' data, studio, hud and blender included; pre-commit clean. Live gates measured in lanes 1–4.

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