feat: implement Gitea MCP Server with full test coverage

Phase 1 implementation complete:
- Complete MCP server with 8 tools (list_issues, get_issue, create_issue, update_issue, add_comment, get_labels, suggest_labels, aggregate_issues)
- Hybrid configuration system (system-level + project-level)
- Branch-aware security model (main/staging/development)
- Mode detection (project vs company/PMO)
- Intelligent label suggestion (44-label taxonomy)
- 42 unit tests (100% passing)
- Comprehensive documentation (README.md, TESTING.md)

Files implemented:
- mcp_server/config.py - Configuration loader
- mcp_server/gitea_client.py - Gitea API client
- mcp_server/server.py - MCP server entry point
- mcp_server/tools/issues.py - Issue operations
- mcp_server/tools/labels.py - Label management
- tests/ - Complete test suite (42 tests)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

mcp-servers/gitea/tests/test_config.py

@@ -0,0 +1,151 @@
+"""
+Unit tests for configuration loader.
+"""
+import pytest
+from pathlib import Path
+import os
+from mcp_server.config import GiteaConfig
+
+
+def test_load_system_config(tmp_path, monkeypatch):
+    """Test loading system-level configuration"""
+    # Mock home directory
+    config_dir = tmp_path / '.config' / 'claude'
+    config_dir.mkdir(parents=True)
+
+    config_file = config_dir / 'gitea.env'
+    config_file.write_text(
+        "GITEA_API_URL=https://test.com/api/v1\n"
+        "GITEA_API_TOKEN=test_token\n"
+        "GITEA_OWNER=test_owner\n"
+    )
+
+    monkeypatch.setenv('HOME', str(tmp_path))
+    monkeypatch.chdir(tmp_path)
+
+    config = GiteaConfig()
+    result = config.load()
+
+    assert result['api_url'] == 'https://test.com/api/v1'
+    assert result['api_token'] == 'test_token'
+    assert result['owner'] == 'test_owner'
+    assert result['mode'] == 'company'  # No repo specified
+    assert result['repo'] is None
+
+
+def test_project_config_override(tmp_path, monkeypatch):
+    """Test that project config overrides system config"""
+    # Set up system config
+    system_config_dir = tmp_path / '.config' / 'claude'
+    system_config_dir.mkdir(parents=True)
+
+    system_config = system_config_dir / 'gitea.env'
+    system_config.write_text(
+        "GITEA_API_URL=https://test.com/api/v1\n"
+        "GITEA_API_TOKEN=test_token\n"
+        "GITEA_OWNER=test_owner\n"
+    )
+
+    # Set up project config
+    project_dir = tmp_path / 'project'
+    project_dir.mkdir()
+
+    project_config = project_dir / '.env'
+    project_config.write_text("GITEA_REPO=test_repo\n")
+
+    monkeypatch.setenv('HOME', str(tmp_path))
+    monkeypatch.chdir(project_dir)
+
+    config = GiteaConfig()
+    result = config.load()
+
+    assert result['repo'] == 'test_repo'
+    assert result['mode'] == 'project'
+
+
+def test_missing_system_config(tmp_path, monkeypatch):
+    """Test error handling for missing system configuration"""
+    monkeypatch.setenv('HOME', str(tmp_path))
+    monkeypatch.chdir(tmp_path)
+
+    with pytest.raises(FileNotFoundError) as exc_info:
+        config = GiteaConfig()
+        config.load()
+
+    assert "System config not found" in str(exc_info.value)
+
+
+def test_missing_required_config(tmp_path, monkeypatch):
+    """Test error handling for missing required variables"""
+    # Clear environment variables
+    for var in ['GITEA_API_URL', 'GITEA_API_TOKEN', 'GITEA_OWNER', 'GITEA_REPO']:
+        monkeypatch.delenv(var, raising=False)
+
+    # Create incomplete config
+    config_dir = tmp_path / '.config' / 'claude'
+    config_dir.mkdir(parents=True)
+
+    config_file = config_dir / 'gitea.env'
+    config_file.write_text(
+        "GITEA_API_URL=https://test.com/api/v1\n"
+        # Missing GITEA_API_TOKEN and GITEA_OWNER
+    )
+
+    monkeypatch.setenv('HOME', str(tmp_path))
+    monkeypatch.chdir(tmp_path)
+
+    with pytest.raises(ValueError) as exc_info:
+        config = GiteaConfig()
+        config.load()
+
+    assert "Missing required configuration" in str(exc_info.value)
+
+
+def test_mode_detection_project(tmp_path, monkeypatch):
+    """Test mode detection for project mode"""
+    config_dir = tmp_path / '.config' / 'claude'
+    config_dir.mkdir(parents=True)
+
+    config_file = config_dir / 'gitea.env'
+    config_file.write_text(
+        "GITEA_API_URL=https://test.com/api/v1\n"
+        "GITEA_API_TOKEN=test_token\n"
+        "GITEA_OWNER=test_owner\n"
+        "GITEA_REPO=test_repo\n"
+    )
+
+    monkeypatch.setenv('HOME', str(tmp_path))
+    monkeypatch.chdir(tmp_path)
+
+    config = GiteaConfig()
+    result = config.load()
+
+    assert result['mode'] == 'project'
+    assert result['repo'] == 'test_repo'
+
+
+def test_mode_detection_company(tmp_path, monkeypatch):
+    """Test mode detection for company mode (PMO)"""
+    # Clear environment variables, especially GITEA_REPO
+    for var in ['GITEA_API_URL', 'GITEA_API_TOKEN', 'GITEA_OWNER', 'GITEA_REPO']:
+        monkeypatch.delenv(var, raising=False)
+
+    config_dir = tmp_path / '.config' / 'claude'
+    config_dir.mkdir(parents=True)
+
+    config_file = config_dir / 'gitea.env'
+    config_file.write_text(
+        "GITEA_API_URL=https://test.com/api/v1\n"
+        "GITEA_API_TOKEN=test_token\n"
+        "GITEA_OWNER=test_owner\n"
+        # No GITEA_REPO
+    )
+
+    monkeypatch.setenv('HOME', str(tmp_path))
+    monkeypatch.chdir(tmp_path)
+
+    config = GiteaConfig()
+    result = config.load()
+
+    assert result['mode'] == 'company'
+    assert result['repo'] is None