# FireRed object interaction text

A-button interactions now use original ROM metatile behaviors, independently of
translated movement collision. This restores the 28 shared furniture/sign scripts:
bookshelves, shop shelves, food, computers, televisions, cabinets, kitchens,
dressers, snacks, paintings, machines, telephones, posters, bins, cups, windows,
lights, tools, video games, blueprints, burglary debris and building/Indigo signs.
The wall Town Map script is also extracted. Existing PC handling remains available.

The source of truth is pret/pokefirered's `GetInteractedMetatileScript` in
`src/field_control_avatar.c`, `data/scripts/flavor_text.inc`, and the user's ROM.
The importer discovers the original bytecode and text rather than embedding game
strings in source. Script extraction was checked against both US ROM revisions;
the full importer still uses its existing FireRed 1.0 support.

Map-specific background scripts and NPCs take precedence over generic furniture.
Background events respect their original facing and elevation constraints; TVs
and building signs require facing north. Dynamic metatile changes are respected.
The school notebook, S.S. Anne captain's book and rival's bookshelf are verified
through their existing map-specific scripts.

Cache version 93 adds `data/generated/gba/objects/pack.lua`, containing the shared
scripts, text, and original behavior tables for all tileset pairs. Fresh imports
produce it automatically. The local test import was upgraded without touching
saves. Restart the game to load the new code/cache.

This restores descriptive object text. Specialized interactive screens such as
the questionnaire, wireless monitor, battle records and Trainer Tower time monitor
are outside this change.

## Warp collision uses the same behavior table

`Collision.installWarps` repairs cells that extract left solid even though the
map header lists a warp there — outdoor `MB_WARP_DOOR` tiles, which classify as
doors but can land on a tile whose extracted collision nibble is impassable.
That repair is now gated on the extracted behavior: it only opens a solid cell
when the behavior is unreadable (the tileset attrs stopped before that mid, so
`Collision.behavior` returns nil) or is a behavior pret would actually warp on —
`Collision.isWarpMetatileBehavior`, i.e. `0x60`–`0x6F` plus `0x71`, the arrow
warps, directional stair warps, doors, ladders, escalators and union-room warp
from `field_control_avatar.c`. A map header warp event can sit on a real wall —
`PalletTown_PlayersHouse_1F` has a dead warp at `(3,9)`, the wall tile left of
the door mat, whose behavior is `MB_NORMAL` — and opening it let the player walk
out of the house through the wall. The warp event itself stays indexed as
before; only the forced-walkable write is gated.

## Verification

Run with LuaJIT from the repository root:

```sh
luajit tests/game3_object_interactions_test.lua
luajit tests/game3_object_interactions_rom_test.lua '/path/to/FireRed.gba'
luajit tests/game3_object_interactions_cache_test.lua '/path/to/cache/firered'
luajit tests/engine/firered_house_wall_warp_bug2297.lua
```

The cache integration test audits all 425 imported layouts (1,578 furniture cells),
exercises 25 furniture behaviors found on those maps via `Field.interact`, and
checks three map-specific book scripts. The ROM test executes all 28 shared text
scripts and verifies the wall Town Map script is present. Unit checks cover facing,
elevation, delayed bundle loading, map bounds, and metatile overrides.