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/routers/vms.py

@@ -2,18 +2,49 @@
 
 from __future__ import annotations
 
-from fastapi import APIRouter, Depends, status
+from fastapi import APIRouter, Depends, Query, status
 
-from ..api_models import DestroyResponse, VmCreateRequest, VmResponse, vm_response
+from ..api_models import (
+    DestroyResponse,
+    PortSyncResponse,
+    PortUpdateRequest,
+    VmActionResultResponse,
+    VmBulkActionRequest,
+    VmCreateRequest,
+    VmLogResponse,
+    VmResponse,
+    vm_response,
+)
 from ..app import Application
-from ..domain import PortRule, VmSpec
-from ..validation import parse_cpu, parse_name, parse_password, parse_ports, parse_ram, parse_username
+from ..domain import PortRule, VmRecord, VmSpec
+from ..validation import (
+    parse_cpu,
+    parse_name,
+    parse_password,
+    parse_ports,
+    parse_ram,
+    parse_timeout,
+    parse_username,
+)
 from .dependencies import get_authorized_application
 
 
 router = APIRouter(prefix="/vms", tags=["vms"])
 
 
+def _mutation_policy_status(vm: VmRecord) -> str:
+    """Return the policy state that follows a successful lifecycle mutation."""
+    if vm.ports is None:
+        return "unmanaged"
+    if vm.operation is not None:
+        return "unknown"
+    if vm.status == "running":
+        return "enforced"
+    if vm.status == "stopped":
+        return "inactive"
+    return "unknown"
+
+
 @router.get("", response_model=list[VmResponse])
 def list_vms(
     application: Application = Depends(get_authorized_application),
@@ -47,29 +78,117 @@ def create_vm(
             ports=ports,
         )
     )
-    policy_status = "unmanaged" if vm.ports is None else "unknown"
-    if vm.ports is not None and vm.status == "running" and vm.operation is None:
-        policy_status = "enforced"
-    return vm_response(vm, policy_status=policy_status)
+    return vm_response(vm, policy_status=_mutation_policy_status(vm))
+
+
+@router.post("/actions", response_model=list[VmActionResultResponse])
+def run_bulk_action(
+    request: VmBulkActionRequest,
+    application: Application = Depends(get_authorized_application),
+) -> list[VmActionResultResponse]:
+    timeout = parse_timeout(str(request.timeout)) if request.timeout is not None else None
+    targets = application.lifecycle.resolve_targets(request.identifiers, all_vms=request.all_vms)
+    results = application.lifecycle.run_many(
+        request.action,
+        [vm.id for vm in targets],
+        timeout=timeout,
+    )
+    return [
+        VmActionResultResponse(
+            id=result.id,
+            action=result.action,
+            outcome=result.outcome,
+            error=result.error,
+        )
+        for result in results
+    ]
+
+
+@router.post("/{vm_id}/start", response_model=VmResponse)
+def start_vm(
+    vm_id: str,
+    application: Application = Depends(get_authorized_application),
+) -> VmResponse:
+    vm = application.lifecycle.start(vm_id)
+    return vm_response(vm, policy_status=_mutation_policy_status(vm))
+
+
+@router.post("/{vm_id}/restart", response_model=VmResponse)
+def restart_vm(
+    vm_id: str,
+    timeout: float | None = None,
+    application: Application = Depends(get_authorized_application),
+) -> VmResponse:
+    vm = (
+        application.lifecycle.restart(vm_id)
+        if timeout is None
+        else application.lifecycle.restart(vm_id, timeout=timeout)
+    )
+    return vm_response(vm, policy_status=_mutation_policy_status(vm))
 
 
 @router.post("/{vm_id}/stop", response_model=VmResponse)
 def stop_vm(
     vm_id: str,
+    timeout: float | None = None,
     application: Application = Depends(get_authorized_application),
 ) -> VmResponse:
-    return vm_response(application.lifecycle.stop(vm_id), policy_status="inactive")
+    vm = (
+        application.lifecycle.stop(vm_id)
+        if timeout is None
+        else application.lifecycle.stop(vm_id, timeout=timeout)
+    )
+    return vm_response(vm, policy_status=_mutation_policy_status(vm))
 
 
 @router.delete("/{vm_id}", response_model=DestroyResponse)
 def destroy_vm(
     vm_id: str,
+    timeout: float | None = None,
     application: Application = Depends(get_authorized_application),
 ) -> DestroyResponse:
-    vm = application.lifecycle.destroy(vm_id)
+    vm = (
+        application.lifecycle.destroy(vm_id)
+        if timeout is None
+        else application.lifecycle.destroy(vm_id, timeout=timeout)
+    )
     return DestroyResponse(id=vm.id)
 
 
+@router.post("/{vm_id}/ports", response_model=VmResponse)
+def update_ports(
+    vm_id: str,
+    request: PortUpdateRequest,
+    application: Application = Depends(get_authorized_application),
+) -> VmResponse:
+    ports = parse_ports([f"{rule.port}:{rule.protocol}" for rule in request.ports])
+    vm = application.lifecycle.set_ports(vm_id, ports, mode=request.mode)
+    return vm_response(vm, policy_status=_mutation_policy_status(vm))
+
+
+@router.post("/{vm_id}/ports/sync", response_model=PortSyncResponse)
+def sync_ports(
+    vm_id: str,
+    application: Application = Depends(get_authorized_application),
+) -> PortSyncResponse:
+    vm = application.lifecycle.sync_ports(vm_id)
+    return PortSyncResponse(
+        id=vm.id,
+        policy_status=_mutation_policy_status(vm),
+        status=vm.status,
+    )
+
+
+@router.get("/{identifier}/logs", response_model=VmLogResponse)
+def get_vm_logs(
+    identifier: str,
+    tail: int = Query(default=100, ge=0, le=1000),
+    application: Application = Depends(get_authorized_application),
+) -> VmLogResponse:
+    log = application.lifecycle.read_log_tail(identifier, tail=tail)
+    return VmLogResponse(content=log.content, truncated=log.truncated)
+
+
 @router.get("/{identifier}", response_model=VmResponse)
 def get_vm(
     identifier: str,