fix: add --no-project flags to prevent mealie installation

Add dedicated docs dependency group with only mkdocs-material to avoid
installing python-ldap during docs builds. python-ldap requires OpenLDAP
dev headers (libldap2-dev) which aren't available on standard CI runners.

.github/workflows/docs.yml

@@ -27,10 +27,10 @@ jobs:
         uses: astral-sh/setup-uv@v4
 
       - name: Install dependencies
-        run: uv sync --group dev
+        run: uv sync --only-group docs --no-install-project
 
       - name: Build docs
-        run: uv run mkdocs build -d site
+        run: uv run --no-project mkdocs build -d site
         working-directory: docs
 
       - name: Upload artifact

pyproject.toml

@@ -57,6 +57,9 @@ pgsql = [
 ]
 
 [dependency-groups]
+docs = [
+    "mkdocs-material==9.7.0",
+]
 dev = [
     "coverage==7.13.0",
     "coveragepy-lcov==0.1.2",

uv.lock

@@ -880,6 +880,9 @@ dev = [
     { name = "types-requests" },
     { name = "types-urllib3" },
 ]
+docs = [
+    { name = "mkdocs-material" },
+]
 
 [package.metadata]
 requires-dist = [
@@ -946,6 +949,7 @@ dev = [
     { name = "types-requests", specifier = "==2.32.4.20250913" },
     { name = "types-urllib3", specifier = "==1.26.25.14" },
 ]
+docs = [{ name = "mkdocs-material", specifier = "==9.7.0" }]
 
 [[package]]
 name = "mergedeep"