refactor: migrate built-in plugins to SDK-only interface

- Six-phase plan complete: webui/cli/healthcheck/pluginmgr/clawhubadapter
  now interact with the kernel exclusively via internal/sdk interfaces;
  all Configure() calls and package-level global injection removed
- buildSDK in internal/plugin/registry.go is the single assembly point
- Add internal/sdk/events.go exporting event types/constants
- Fix ProviderManager cooldown sharing: LuaAdaptedProvider.Name() now
  returns the source name instead of lua_<adapter>, so multiple sources
  sharing an adapter (single script load via shared VM AdapterCache) no
  longer share failure-cooldown state
- Verified: build/vet/tests green, deployed to homeagent.service with
  full plugin capability testing via local OpenAI-compatible mock

internal/supervisor/daemon.go

@@ -9,6 +9,7 @@ import (
 
 	"gitcode.com/JianFeeeee/HomeAgent/internal/network"
 	"gitcode.com/JianFeeeee/HomeAgent/internal/tracker"
+	sdk "gitcode.com/JianFeeeee/HomeAgent/internal/sdk"
 	"gitcode.com/JianFeeeee/HomeAgent/pkg/types"
 )
 
@@ -224,11 +225,5 @@ func (d *Daemon) RollbackAgent(id types.AgentID, snapID types.SnapshotID) error
 	return fmt.Errorf("no tracker available for rollback")
 }
 
-type AgentStatus struct {
-	ID           types.AgentID            `json:"id"`
-	State        types.AgentState         `json:"state"`
-	Health       types.HealthStatus       `json:"health"`
-	Uptime       time.Duration            `json:"uptime,omitempty"`
-	Network      types.NetworkCheckResult `json:"network,omitempty"`
-	TrackerStats map[string]interface{}   `json:"tracker_stats,omitempty"`
-}
+// AgentStatus 已迁入内置 SDK，此处保留别名以兼容现有调用方。
+type AgentStatus = sdk.AgentStatus