feat: Implement UVM Dashboard with frontend and backend integration

- Added dashboard.js for frontend functionality, including VM management and system health monitoring.
- Created dashboard route to serve the dashboard HTML.
- Introduced diagnostics route for token-protected host diagnostics.
- Enhanced VMs router with bulk actions, VM log retrieval, and port management.
- Updated lifecycle service to read VM log tails with truncation handling.
- Integrated static file serving for dashboard assets in the FastAPI server.
- Redirect root URL to the dashboard for improved user experience.

uvm/api_models.py

@@ -73,6 +73,46 @@ class DestroyResponse(BaseModel):
     status: str = "terminated"
 
 
+class PortUpdateRequest(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+
+    mode: Literal["set", "open", "close"] = "set"
+    ports: list[PortRuleModel] = Field(default_factory=list)
+
+
+class PortSyncResponse(BaseModel):
+    id: str
+    policy_status: str
+    status: str
+
+
+class VmLogResponse(BaseModel):
+    content: str
+    truncated: bool
+
+
+class DiagnosticResponse(BaseModel):
+    name: str
+    ok: bool
+    message: str
+
+
+class VmBulkActionRequest(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+
+    action: Literal["start", "stop", "restart", "delete", "ports-sync"]
+    identifiers: list[str] = Field(default_factory=list)
+    all_vms: bool = Field(default=False, strict=True)
+    timeout: float | None = None
+
+
+class VmActionResultResponse(BaseModel):
+    id: str
+    action: str
+    outcome: str
+    error: str | None = None
+
+
 def vm_response(
     vm: VmRecord,
     *,