Repo: reclaim 8.5 GB of unreachable vendor content (audit L7/L8/M13)

Assets/ 14 GB -> 5.5 GB.

- Assets/BefourStudios DELETED (8.2 GB). Transitive-closure reachability
  from every project scene, prefab and settings asset found exactly FOUR
  reachable files in the whole pack — four textures. Relocated them to
  Assets/_Project/Textures/Env via AssetDatabase.MoveAsset with the GUIDs
  verified preserved, then removed the pack. It was HDRP art for a
  direction DR-051 deleted; re-downloadable from the Asset Store.
  (3.3 GB of that was gitignored .unitypackage archives git rm could not
  see — removed separately.)
- 92 vendor demo/gallery/overview scenes deleted (294 MB). They are the
  ten largest tracked blobs in the repo, stored as non-LFS YAML that
  Unity must parse and index on every database rebuild. Build settings
  reference only MainMenu and Game.
- com.shadercrew.the-toon-shader.3d + .core removed (132 MB embedded,
  referenced by nothing).
- Assets/Screenshots (182 PNGs, 22 MB) moved to the gitignored
  _visual_scratch/ — Unity was importing them as textures.
- manifest: dropped com.unity.ai.navigation and com.unity.cinemachine
  (zero references — no NavMesh assets, no Cinemachine in any scene).
  Pinned com.coplaydev.unity-mcp to a SHA instead of #main; that floating
  branch ref silently re-resolving IS what the dirty packages-lock.json
  was, and it means two machines can run different bridge versions while
  both match the committed manifest.

KEPT after checking, against the audit's suggestion: visualeffectgraph
(27 .vfx assets) and timeline (213 .playable) are genuinely used. And I
RESTORED com.unity.ai.assistant + com.unity.ai.inference after removing
them left half the AI Toolkit resolved in Library/PackageCache and
crashed two AssetImportWorkers on domain reload — editor-only tooling is
not worth destabilising the install for.

Verified after: 0 compile errors, 304/304 green, DevSandbox plays with
the player, an enemy, live socket stats and no leaked RPCs.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Packages/manifest.json

@@ -1,11 +1,9 @@
 {
   "dependencies": {
-    "com.coplaydev.unity-mcp": "https://github.com/CoplayDev/unity-mcp.git?path=/MCPForUnity#main",
+    "com.coplaydev.unity-mcp": "https://github.com/CoplayDev/unity-mcp.git?path=/MCPForUnity#4ce7dd3cc54e37e2ed6dc59cb5a047f3dccb3f50",
     "com.unity.ai.assistant": "2.14.0-pre.1",
     "com.unity.ai.inference": "2.6.1",
-    "com.unity.ai.navigation": "2.0.13",
     "com.unity.charactercontroller": "1.4.2",
-    "com.unity.cinemachine": "3.1.7",
     "com.unity.cloud.gltfast": "6.19.0",
     "com.unity.collab-proxy": "2.12.4",
     "com.unity.entities": "6.5.0",
@@ -13,19 +11,6 @@
     "com.unity.ide.rider": "3.0.40",
     "com.unity.ide.visualstudio": "2.0.27",
     "com.unity.inputsystem": "1.19.0",
-    "com.unity.multiplayer.center": "1.0.1",
-    "com.unity.multiplayer.playmode": "2.0.2",
-    "com.unity.multiplayer.tools": "2.2.8",
-    "com.unity.netcode": "6.5.0",
-    "com.unity.physics": "6.5.0",
-    "com.unity.probuilder": "6.1.2",
-    "com.unity.render-pipelines.universal": "17.5.0",
-    "com.unity.services.multiplayer": "2.1.3",
-    "com.unity.shadergraph": "17.5.0",
-    "com.unity.test-framework": "1.7.0",
-    "com.unity.timeline": "1.8.12",
-    "com.unity.ugui": "2.5.0",
-    "com.unity.visualeffectgraph": "17.5.0",
     "com.unity.modules.accessibility": "1.0.0",
     "com.unity.modules.adaptiveperformance": "1.0.0",
     "com.unity.modules.ai": "1.0.0",
@@ -59,6 +44,19 @@
     "com.unity.modules.vehicles": "1.0.0",
     "com.unity.modules.video": "1.0.0",
     "com.unity.modules.wind": "1.0.0",
-    "com.unity.modules.xr": "1.0.0"
+    "com.unity.modules.xr": "1.0.0",
+    "com.unity.multiplayer.center": "1.0.1",
+    "com.unity.multiplayer.playmode": "2.0.2",
+    "com.unity.multiplayer.tools": "2.2.8",
+    "com.unity.netcode": "6.5.0",
+    "com.unity.physics": "6.5.0",
+    "com.unity.probuilder": "6.1.2",
+    "com.unity.render-pipelines.universal": "17.5.0",
+    "com.unity.services.multiplayer": "2.1.3",
+    "com.unity.shadergraph": "17.5.0",
+    "com.unity.test-framework": "1.7.0",
+    "com.unity.timeline": "1.8.12",
+    "com.unity.ugui": "2.5.0",
+    "com.unity.visualeffectgraph": "17.5.0"
   }
 }