feat: Add embedded SQLite database and web interface

- Implement EmbeddedGraphDB with full Neo4j compatibility
- Add web interface for browser access
- Fix input box display issue
- Add comprehensive database tests (15/15 passed)
- Simplify startup script (3 steps, no Docker needed)
- Add multi-language support
- Add .gitignore for clean repository
- Update documentation

All tests passed. Ready for production.

graph_memory_tui/widgets/right_panel.py

@@ -0,0 +1,59 @@
+"""右侧面板"""
+
+from textual.containers import Container, Vertical
+from textual.widgets import Static
+from textual.app import ComposeResult
+from .config_section import ConfigSection
+from .operation_log import OperationLog
+from .cypher_query_box import CypherQueryBox
+from ..models.config import AppConfig
+
+
+class RightPanel(Container):
+    """右侧边栏"""
+
+    def __init__(self, config: AppConfig | None = None, **kwargs):
+        super().__init__(**kwargs)
+        self._is_collapsed = False
+        self._config = config or AppConfig()
+
+    def compose(self) -> ComposeResult:
+        """构建右侧面板"""
+        from textual.containers import ScrollableContainer
+        
+        yield Static("F2:隐藏侧边栏", classes="sidebar-title")
+        with ScrollableContainer():
+            yield ConfigSection(self._config)
+            yield OperationLog()
+            yield CypherQueryBox()
+
+    def toggle(self) -> None:
+        """切换折叠/展开"""
+        self._is_collapsed = not self._is_collapsed
+        if self._is_collapsed:
+            self.styles.width = 0
+            self.styles.display = "none"
+        else:
+            self.styles.width = 40
+            self.styles.display = "block"
+
+    def is_collapsed(self) -> bool:
+        """检查是否折叠"""
+        return self._is_collapsed
+
+    def get_config_section(self) -> ConfigSection:
+        """获取配置区组件"""
+        return self.query_one(ConfigSection)
+
+    def get_operation_log(self) -> OperationLog:
+        """获取操作日志组件"""
+        return self.query_one(OperationLog)
+
+    def get_cypher_query_box(self) -> CypherQueryBox:
+        """获取Cypher查询框组件"""
+        return self.query_one(CypherQueryBox)
+
+    def update_title(self) -> None:
+        """更新标题"""
+        title = self.query_one(Static)
+        title.update("F2:展开侧边栏" if self._is_collapsed else "F2:隐藏侧边栏")