Merge remote-tracking branch 'origin/dev' into feat/vad-agent

# Conflicts:
#	pyproject.toml
#	src/control_backend/main.py
#	uv.lock

pyproject.toml

@@ -20,6 +20,11 @@ dependencies = [
 ]
 
 [dependency-groups]
+dev = [
+    "pre-commit>=4.3.0",
+    "ruff>=0.14.2",
+    "ruff-format>=0.3.0",
+]
 integration-test = [
     "soundfile>=0.13.1",
 ]
@@ -32,3 +37,21 @@ test = [
 
 [tool.pytest.ini_options]
 pythonpath = ["src"]
+
+[tool.ruff]
+line-length = 100
+
+[tool.ruff.lint]
+extend-select = [
+    "E",   # pycodestyle
+    "F",   # pyflakes
+    "I",   # isort (import sorting)
+    "UP",  # pyupgrade (modernize code)
+    "B",   # flake8-bugbear (common bugs)
+    "C4",  # flake8-comprehensions (unnecessary comprehensions)
+]
+
+ignore = [
+    "E226",  # spaces around operators
+    "E701",  # multiple statements on a single line
+]