psx map standalone exporter

docs/psx/map-rendering.md

@@ -426,7 +426,7 @@ Functions and globals inspected in this pass:
    - `psx_lzss_unpack_into_level_buffer` (`0x8003b00c`, renamed this pass)
    - `psx_lzss_pack_level_buffer` (`0x8003aba8`, renamed this pass)
    - `psx_load_type_state_banks` (`0x8003917c`)
-   - `psx_cache_type_art_descriptor_and_resource` (`0x80045ffc`)
+   - `psx_install_type_art_active_header_and_built_resource` (`0x80045ffc`)
 - section-0 authored dispatch:
    - `psx_dispatch_section0_dispatch_roots` (`0x800256b0`)
    - `psx_dispatch_section0_constructor_placements` (`0x800258cc`)
@@ -603,7 +603,7 @@ Functions/data inspected in this pass:
    - `psx_object_select_state_from_transition_table`
    - `psx_object_integrate_motion_and_route_visible`
    - `psx_draw_main_visible_object`
-   - `psx_cache_type_art_descriptor_and_resource`
+   - `psx_install_type_art_active_header_and_built_resource`
    - `psx_level_post_load_runtime_reset`
    - `psx_section0_dispatch_root_seed_marker_channel_table`
 
@@ -1033,7 +1033,7 @@ The resource creation/submission lane is now explicit enough to treat as stable
 
 ### Creation and per-type cache
 
-- `psx_cache_type_art_descriptor_and_resource` (`0x80045ffc`) stores the per-type descriptor at `DAT_800758d8[type]` and materialized drawable resource at `DAT_800758c8[type]`.
+- `psx_install_type_art_active_header_and_built_resource` (`0x80045ffc`) first stores the incoming active header at `DAT_800758d8[type]`, then materializes and caches the drawable resource at `DAT_800758c8[type]`, and temporarily mirrors that built resource back into `DAT_800758d8[type]` until the later header-only override stream restores raw `0x58`-byte headers.
 - Exact kind branch in this cache helper:
    - `0x80046048`: `kind == 4` -> `psx_resource_bind_single_image_vram_slot` (`0x800444e4`)
    - `0x80046054`: `kind == 5` -> allocate bundle wrapper and call `image_bundle_load_to_vram` (`0x80044614`)