fix(cookbook): pull llama.cpp from the ggml-org GHCR namespace (#4457) (#4490)

The Dependencies tab's llama.cpp docker recipe surfaced
\`docker pull ghcr.io/ggerganov/llama.cpp:server-cuda\`. The upstream
repo moved from github.com/ggerganov/llama.cpp to
github.com/ggml-org/llama.cpp and the old GHCR namespace no longer
publishes images, so copying the recipe failed with:

  failed to resolve reference "ghcr.io/ggerganov/llama.cpp:server-cuda":
  not found

Point the recipe at \`ghcr.io/ggml-org/llama.cpp:server-cuda\`, which is
already the namespace routes/cookbook_routes.py uses for the source
clone. Adds a regression test in the same shape as
test_cookbook_diagnosis_js.py asserting the new namespace and forbidding
the dead one.

No CSS/HTML/SVG/style changes — the file is a pure data module
(no DOM access) consumed by other renderers; only the displayed command
text changes.

static/js/cookbook-deps-recipes.js

@@ -56,7 +56,7 @@ const _RECIPES = [
     match: () => true,
     variants: {
       pip:    { commands: ['CMAKE_ARGS="-DGGML_CUDA=on" uv pip install -U "llama-cpp-python[server]"'] },
-      docker: { commands: ['docker pull ghcr.io/ggerganov/llama.cpp:server-cuda'] },
+      docker: { commands: ['docker pull ghcr.io/ggml-org/llama.cpp:server-cuda'] },
     },
   },
 ];

tests/test_cookbook_deps_recipes.py

@@ -0,0 +1,27 @@
+"""Guard the llama.cpp Docker pull recipe surfaced in Cookbook → Dependencies.
+
+The upstream repo moved from github.com/ggerganov/llama.cpp to
+github.com/ggml-org/llama.cpp. The old GHCR namespace
+(ghcr.io/ggerganov/llama.cpp) no longer publishes images, so the
+docker variant in the Dependencies panel returned
+"failed to resolve reference … not found" when copied verbatim (#4457).
+The other llama.cpp reference in routes/cookbook_routes.py already uses
+ggml-org; this guards the JS recipe so the two stay aligned.
+"""
+from pathlib import Path
+
+RECIPES_JS = (
+    Path(__file__).resolve().parent.parent / "static" / "js" / "cookbook-deps-recipes.js"
+)
+
+
+def test_llama_cpp_docker_recipe_uses_ggml_org_namespace():
+    source = RECIPES_JS.read_text(encoding="utf-8")
+
+    assert "ghcr.io/ggml-org/llama.cpp:server-cuda" in source, (
+        "Expected the llama.cpp docker recipe to pull from the ggml-org namespace."
+    )
+    assert "ghcr.io/ggerganov/llama.cpp" not in source, (
+        "The ggerganov GHCR namespace no longer publishes llama.cpp images. "
+        "Use ghcr.io/ggml-org/llama.cpp:server-cuda."
+    )