chore: 项目更名为 HuiBrain

全局替换 EduBrain -> HuiBrain, edu-brain -> huibrain, edu_brain -> hui_brain, EDUBRAIN -> HUIBRAIN
涉及文件：README.md, pyproject.toml, docker-compose.yml, .env, .env.example,
app/config.py, app/main.py, app/wework_bot.py, app/__init__.py, app/mcp/server.py,
static/index.html, docs/IMAGE_API_GUIDE.md

pyproject.toml

@@ -3,14 +3,14 @@ requires = ["setuptools>=75.0", "wheel"]
 build-backend = "setuptools.backends._legacy:_Backend"
 
 [project]
-name = "edu-brain"
+name = "huibrain"
 version = "1.2.0"
 description = "中文直播教育知识库系统 - 基于向量检索的知识管理平台"
 readme = "README.md"
 requires-python = ">=3.11"
 license = {text = "MIT"}
 authors = [
-    {name = "EduBrain Team"},
+    {name = "HuiBrain Team"},
 ]
 classifiers = [
     "Development Status :: 3 - Alpha",
@@ -45,8 +45,8 @@ dev = [
 ]
 
 [project.scripts]
-edu-brain = "app.main:app"
-edu-brain-mcp = "app.mcp.server:run_mcp_server"
+huibrain = "app.main:app"
+huibrain-mcp = "app.mcp.server:run_mcp_server"
 
 [tool.ruff]
 target-version = "py311"