Migrate dependency management to uv

Replace requirements.txt with pyproject.toml (direct deps only; uv
resolves the rest into uv.lock). Point the systemd unit at the
uv-managed .venv, and gitignore it.

Run `uv lock` to generate the lockfile and commit it.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.gitignore

@@ -1,4 +1,5 @@
 venv/
+.venv/
 db.sqlite3
 __pycache__/
 *.pyc

deploy/food.service

@@ -7,9 +7,9 @@ Type=notify
 User=openclaw
 Group=openclaw
 WorkingDirectory=/var/lib/food
-Environment="PATH=/var/lib/food/venv/bin:/usr/bin"
+Environment="PATH=/var/lib/food/.venv/bin:/usr/bin"
 Environment="DJANGO_SETTINGS_MODULE=food_project.settings"
-ExecStart=/var/lib/food/venv/bin/gunicorn food_project.wsgi:application \
+ExecStart=/var/lib/food/.venv/bin/gunicorn food_project.wsgi:application \
     --bind 127.0.0.1:8042 \
     --workers 2 \
     --timeout 30 \

pyproject.toml

@@ -0,0 +1,16 @@
+[project]
+name = "food"
+version = "0.1.0"
+description = "Pantry + meta-recipe meal planning (Django, HTMX)"
+requires-python = ">=3.11"
+dependencies = [
+    "django==5.2.12",
+    "djangorestframework==3.17.1",
+    "whitenoise==6.12.0",
+    "gunicorn==25.3.0",
+    "recipe-scrapers==15.11.0",
+    "requests==2.33.1",
+]
+
+# No [build-system]: this is an application, not an installable package, so uv
+# treats it as a virtual project and won't try to build/install it.

requirements.txt

@@ -1,30 +0,0 @@
-asgiref==3.11.1
-beautifulsoup4==4.14.3
-certifi==2026.2.25
-charset-normalizer==3.4.7
-Django==5.2.12
-djangorestframework==3.17.1
-extruct==0.18.0
-gunicorn==25.3.0
-html-text==0.7.1
-html5lib==1.1
-idna==3.11
-isodate==0.7.2
-jstyleson==0.0.2
-lxml==6.0.2
-lxml_html_clean==0.4.4
-mf2py==2.0.1
-packaging==26.0
-pyparsing==3.3.2
-pyrdfa3==3.6.5
-rdflib==7.6.0
-recipe_scrapers==15.11.0
-requests==2.33.1
-six==1.17.0
-soupsieve==2.8.3
-sqlparse==0.5.5
-typing_extensions==4.15.0
-urllib3==2.6.3
-w3lib==2.4.1
-webencodings==0.5.1
-whitenoise==6.12.0