refactor: extract global styles and tokens (Task 2.1)

- Create styles/tokens.css with CSS custom properties and dark theme
- Create styles/global.css with resets, shell layout, and navigation
- Create styles/utilities.css with generic utilities and primitives
- Create styles/syntax-highlight.css with Prism.js theme
- Update main.tsx to import the 4 new style files
- Keep styles.css intact for backward compatibility

Quality gates: build (pass), lint (pass)
Refs: repo-restructure Task 2.1

apps/api/src/schemas/tool_config.py

@@ -0,0 +1,47 @@
+"""Tool config request/response schemas."""
+
+from pydantic import BaseModel, Field
+
+
+class ToolConfigCreate(BaseModel):
+    tool_type_id: str = Field(description="UUID of the tool type")
+    key: str = Field(description="Configuration key")
+    value: str = Field(description="Configuration value")
+    config_type: str = Field(default="env", description="Config type: env or file")
+    file_path: str | None = Field(default=None, description="File path for file configs")
+    port_override: int | None = Field(default=None, description="Port override")
+    start_command: str | None = Field(default=None, description="Start command override")
+    working_directory: str | None = Field(default=None, description="Working directory")
+    environment_variables: dict[str, str] | None = Field(
+        default=None, description="Additional environment variables"
+    )
+    volumes: list[dict] | None = Field(default=None, description="Volume mounts")
+
+
+class ToolConfigUpdate(BaseModel):
+    value: str | None = None
+    config_type: str | None = None
+    file_path: str | None = None
+    port_override: int | None = None
+    start_command: str | None = None
+    working_directory: str | None = None
+    environment_variables: dict[str, str] | None = None
+    volumes: list[dict] | None = None
+
+
+class ToolConfigResponse(BaseModel):
+    id: str
+    tool_type_id: str
+    user_id: str
+    project_id: str | None
+    key: str
+    value: str
+    config_type: str
+    file_path: str | None
+    port_override: int | None
+    start_command: str | None
+    working_directory: str | None
+    environment_variables: dict[str, str] | None
+    volumes: list[dict] | None
+    created_at: str
+    updated_at: str