Migrate vagrant-skeleton to atlas-uv consumers

Asset-aliases now reference the three baked subterrain atlas-sets
(subterrain_player, subterrain_tiles, subterrain_world) rather than
the legacy indexed pack labels. The rig asset_pack updates to
subterrain_player and each bone gains a calibrated anchor offset.
Furniture-draw loads the subterrain_world atlas once and renders
via source-rect draw_sprite_transform. The map tilemap field updates
to subterrain_tiles to match the new atlas-id. Dep-bumps for
lib-core.maps 0.3.0, lib-core.puppet 0.5.0, and
lib-asset.prototype-subterrain 0.2.0. Replace r_lib.draw_map with
draw_map_pre/post_entities.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

init.lua

@@ -1,4 +1,4 @@
--- sporel-module-vagrant-skeleton v0.4.4
+-- sporel-module-vagrant-skeleton v0.5.0
 -- Sprite-mode test-chamber: 13-bone humanoid puppet + sprite-tilemap +
 -- hardcoded furniture. Subterrain-style puppet control model:
 -- multi-look-target (aim/soft), slerp body rotation, hip-static legs,
@@ -27,9 +27,8 @@ local INTERACTION_RANGE = 40         -- pixels
 local state = {
     player = nil,
     map = nil,
-    bed_tex = nil,
-    bench_tex = nil,
-    backpack_tex = nil,
+    world_tex = nil,         -- subterrain_world atlas diffuse handle
+    furniture_uvs = nil,     -- name -> { x, y, w, h } from atlas JSON
     -- Subterrain-style controller state:
     walk_anim_current = nil,   -- "walk_fwd_lower" / "walk_back_lower" / etc. (nil = idle_lower)
     lower_control_rot_deg = 0,
@@ -189,11 +188,15 @@ function M.init(ctx)
         puppet.write_bone(handle, "foot_r", { rot = foot_local_deg })
     end)
 
-    -- Furniture textures.
-    local world_lib = aliases.world
-    state.bed_tex      = engine.asset.load_texture(world_lib .. "/assets/world/bed_001.png")
-    state.bench_tex    = engine.asset.load_texture(world_lib .. "/assets/world/bench_001.png")
-    state.backpack_tex = engine.asset.load_texture(world_lib .. "/assets/world/backpack_001.png")
+    -- Furniture atlas (subterrain_world): load JSON + diffuse texture once.
+    local world_lib  = aliases.subterrain_world
+    local world_base = world_lib .. "/assets/atlases/subterrain_world"
+    local world_meta = engine.asset.load_json(world_base .. "/tiles.atlas.json")
+    state.world_tex  = engine.asset.load_texture(world_base .. "/tiles.diffuse.atlas.png")
+    state.furniture_uvs = {}
+    for _, t in ipairs(world_meta.tiles) do
+        state.furniture_uvs[t.name] = { x = t.uv[1], y = t.uv[2], w = t.uv[3], h = t.uv[4] }
+    end
 
     -- Input bindings.
     input.bind("walk_left",  { "a" })
@@ -212,10 +215,9 @@ function M.init(ctx)
             ctx.distance))
     end)
 
-    -- CI trace: assets loaded count (puppet+tilemap+furniture textures).
+    -- CI trace: assets loaded count (3 atlas textures: player + tiles + world).
     if CI_FRAME_PERF and not ci_assets_traced then
-        -- 7 puppet textures + 4 tile textures + 3 furniture textures = 14
-        engine.print("vagrant: assets_loaded=14")
+        engine.print("vagrant: assets_loaded=3")
         ci_assets_traced = true
     end
 
@@ -318,14 +320,24 @@ end
 
 function M.draw(ctx)
     camera.begin()
-        -- Sprite-tilemap.
-        r_lib.draw_map()
+        maps.draw_map_pre_entities()
         -- Hardcoded furniture placements (test-chamber spirit).
-        engine.render.draw_sprite_transform(state.bed_tex,      200, 150, 0, 1, 1, 32, 32, 0xFFFFFFFF)
-        engine.render.draw_sprite_transform(state.bench_tex,    400, 300, 0, 1, 1, 32, 32, 0xFFFFFFFF)
-        engine.render.draw_sprite_transform(state.backpack_tex, 350, 400, 0, 1, 1, 16, 16, 0xFFFFFFFF)
+        -- Render via source-rect primitive using subterrain_world atlas UVs.
+        local bed_uv      = state.furniture_uvs["bed_001"]
+        local bench_uv    = state.furniture_uvs["bench_001"]
+        local backpack_uv = state.furniture_uvs["backpack_001"]
+        engine.render.draw_sprite_transform(state.world_tex, 200, 150, 0, 1, 1,
+            bed_uv.w / 2, bed_uv.h / 2, 0xFFFFFFFF,
+            bed_uv.x, bed_uv.y, bed_uv.w, bed_uv.h)
+        engine.render.draw_sprite_transform(state.world_tex, 400, 300, 0, 1, 1,
+            bench_uv.w / 2, bench_uv.h / 2, 0xFFFFFFFF,
+            bench_uv.x, bench_uv.y, bench_uv.w, bench_uv.h)
+        engine.render.draw_sprite_transform(state.world_tex, 350, 400, 0, 1, 1,
+            backpack_uv.w / 2, backpack_uv.h / 2, 0xFFFFFFFF,
+            backpack_uv.x, backpack_uv.y, backpack_uv.w, backpack_uv.h)
         -- Puppet (sprite-mode via texture_handles populated by load_rig+load_textures).
         puppet.render(state.player)
+        maps.draw_map_post_entities()
     camera.finish()
     if CI_FRAME_PERF then
         engine.print("vagrant: render_frame_ok")