refactor: use uv for dependency management

Dockerfile

@@ -2,14 +2,19 @@ FROM python:3.11-slim
 
 WORKDIR /app
 
+# Install uv
+RUN pip install uv
+
 # Install system deps
 RUN apt-get update && apt-get install -y \
     ffmpeg \
     && rm -rf /var/lib/apt/lists/*
 
-# Install Python deps
-COPY backend/requirements.txt .
-RUN pip install --no-cache-dir -r requirements.txt
+# Copy project files
+COPY backend/pyproject.toml backend/requirements.txt ./
+
+# Install dependencies using uv
+RUN uv pip install --system -r requirements.txt
 
 # Copy code
 COPY backend/ ./backend/

backend/pyproject.toml

@@ -0,0 +1,31 @@
+[project]
+name = "insightflow-backend"
+version = "0.3.0"
+description = "InsightFlow Backend - Knowledge Graph Platform"
+requires-python = ">=3.11"
+dependencies = [
+    "fastapi>=0.115.0",
+    "uvicorn[standard]>=0.32.0",
+    "python-multipart>=0.0.17",
+    "oss2>=2.18.6",
+    "alibabacloud-tea-openapi>=0.3.12",
+    "alibabacloud-tingwu20230930>=2.0.2",
+    "httpx>=0.27.2",
+    "pydantic>=2.9.2",
+    "python-dotenv>=1.0.1",
+]
+
+[project.optional-dependencies]
+dev = [
+    "pytest>=8.0.0",
+    "black>=24.0.0",
+    "ruff>=0.3.0",
+]
+
+[tool.black]
+line-length = 100
+target-version = ['py311']
+
+[tool.ruff]
+line-length = 100
+select = ["E", "F", "I"]

backend/requirements.txt

@@ -1,9 +0,0 @@
-fastapi==0.115.0
-uvicorn[standard]==0.32.0
-python-multipart==0.0.17
-oss2==2.18.6
-alibabacloud-tea-openapi==0.3.12
-alibabacloud-tingwu20230930==2.0.2
-httpx==0.27.2
-pydantic==2.9.2
-python-dotenv==1.0.1