feat(archetypes): make magic-wall runes emit restrained red light

arch/special/magic_wall/magic_wall.arc

@@ -9,6 +9,8 @@ is_turnable 1
 speed -0.02
 last_eat 1
 maxsp 1
+glow_radius 1
+light_color ff3030
 no_pick 1
 sys_object 1
 dam -1

docs/LIGHT_SOURCE_AUDIT.md

@@ -17,9 +17,15 @@ Schema version 7 supports semantic `fixture_groups` for an authored fixture
 family. A group pins its archetype set, default radii and color,
 per-archetype placement counts, map coverage, intentional non-emitting members,
 the reviewed count of emitting same-tile compositions, applicable contextual
-checks, and a digest of every resolved placement. The count makes overlap
-acceptance explicit while the digest pins the exact placements and co-emitter
-identities, effective light fields, visible art, and source semantics. These
+checks, and a digest of every resolved placement. A required family may set
+`same_tile_review` to `exact` in the fixture contract; its review must then
+provide `intentional_same_tile_emitters`, mapping
+each emitting fixture placement ID that shares a tile with another source to a
+concise review rationale. The count makes overlap acceptance explicit, while
+the contracted ledger additionally makes its exact placement keys fail closed.
+The semantic digest always pins co-located source identities, effective light
+fields, visible art, and source semantics, so adding, removing, moving, or
+replacing either source requires an explicit review refresh. These
 checks are derived entirely from authored sources: fixture groups do not carry
 view IDs or depend on screenshots, capture manifests, or image files.
 Required families are anchored independently in
@@ -66,7 +72,11 @@ When an emitter changes, inspect its actual main-line archetype or map context
 and the pinned Classic decision. Preserve or revise the color and rationale
 intentionally; do not mass-color invisible or map-local lights by name or
 radius. Update the matching ledger row with the semantic hash from the read-only
-inventory, then run `python3 tools/world_content_audit.py lights --check` and
+inventory. For a fixture that shares its tile with another emitter, also verify
+the exact `same_tile_emitters` identities in the inventory. For a family whose
+fixture contract sets `same_tile_review` to `exact`, add or update its
+`intentional_same_tile_emitters` rationale. Then run
+`python3 tools/world_content_audit.py lights --check` and
 `python3 tools/validate.py`. Genuine replacement-specific divergences must be
 documented rather than copied mechanically from `1.x`.
 

maps/light-source-fixture-contract.json

@@ -1,6 +1,21 @@
 {
   "schema_version": 1,
   "fixture_groups": {
+    "magic-wall-rune-fixtures": {
+      "archetypes": [
+        "magic_wall"
+      ],
+      "checks": [
+        "magic-wall-active-state",
+        "magic-wall-corners",
+        "magic-wall-dense-cluster",
+        "magic-wall-disabled-state",
+        "magic-wall-narrow-corridors",
+        "magic-wall-same-tile-sources",
+        "magic-wall-switch-transitions"
+      ],
+      "same_tile_review": "exact"
+    },
     "warm-candle-fixtures": {
       "archetypes": [
         "candle2_on",