Admin UI add maintenance menu (#6944)

* add ui for maintenance

* valid config loading. fix workers page.

* refactor

* grpc between admin and workers

* add a long-running bidirectional grpc call between admin and worker
* use the grpc call to heartbeat
* use the grpc call to communicate
* worker can remove the http client
* admin uses http port + 10000 as its default grpc port

* one task one package

* handles connection failures gracefully with exponential backoff

* grpc with insecure tls

* grpc with optional tls

* fix detecting tls

* change time config from nano seconds to seconds

* add tasks with 3 interfaces

* compiles reducing hard coded

* remove a couple of tasks

* remove hard coded references

* reduce hard coded values

* remove hard coded values

* remove hard coded from templ

* refactor maintenance package

* fix import cycle

* simplify

* simplify

* auto register

* auto register factory

* auto register task types

* self register types

* refactor

* simplify

* remove one task

* register ui

* lazy init executor factories

* use registered task types

* DefaultWorkerConfig remove hard coded task types

* remove more hard coded

* implement get maintenance task

* dynamic task configuration

* "System Settings" should only have system level settings

* adjust menu for tasks

* ensure menu not collapsed

* render job configuration well

* use templ for ui of task configuration

* fix ordering

* fix bugs

* saving duration in seconds

* use value and unit for duration

* Delete WORKER_REFACTORING_PLAN.md

* Delete maintenance.json

* Delete custom_worker_example.go

* remove address from workers

* remove old code from ec task

* remove creating collection button

* reconnect with exponential backoff

* worker use security.toml

* start admin server with tls info from security.toml

* fix "weed admin" cli description

weed/worker/tasks/erasure_coding/ec.go

@@ -0,0 +1,79 @@
+package erasure_coding
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/seaweedfs/seaweedfs/weed/glog"
+	"github.com/seaweedfs/seaweedfs/weed/worker/tasks"
+	"github.com/seaweedfs/seaweedfs/weed/worker/types"
+)
+
+// Task implements erasure coding operation to convert volumes to EC format
+type Task struct {
+	*tasks.BaseTask
+	server   string
+	volumeID uint32
+}
+
+// NewTask creates a new erasure coding task instance
+func NewTask(server string, volumeID uint32) *Task {
+	task := &Task{
+		BaseTask: tasks.NewBaseTask(types.TaskTypeErasureCoding),
+		server:   server,
+		volumeID: volumeID,
+	}
+	return task
+}
+
+// Execute executes the erasure coding task
+func (t *Task) Execute(params types.TaskParams) error {
+	glog.Infof("Starting erasure coding task for volume %d on server %s", t.volumeID, t.server)
+
+	// Simulate erasure coding operation with progress updates
+	steps := []struct {
+		name     string
+		duration time.Duration
+		progress float64
+	}{
+		{"Analyzing volume", 2 * time.Second, 15},
+		{"Creating EC shards", 5 * time.Second, 50},
+		{"Verifying shards", 2 * time.Second, 75},
+		{"Finalizing EC volume", 1 * time.Second, 100},
+	}
+
+	for _, step := range steps {
+		if t.IsCancelled() {
+			return fmt.Errorf("erasure coding task cancelled")
+		}
+
+		glog.V(1).Infof("Erasure coding task step: %s", step.name)
+		t.SetProgress(step.progress)
+
+		// Simulate work
+		time.Sleep(step.duration)
+	}
+
+	glog.Infof("Erasure coding task completed for volume %d on server %s", t.volumeID, t.server)
+	return nil
+}
+
+// Validate validates the task parameters
+func (t *Task) Validate(params types.TaskParams) error {
+	if params.VolumeID == 0 {
+		return fmt.Errorf("volume_id is required")
+	}
+	if params.Server == "" {
+		return fmt.Errorf("server is required")
+	}
+	return nil
+}
+
+// EstimateTime estimates the time needed for the task
+func (t *Task) EstimateTime(params types.TaskParams) time.Duration {
+	// Base time for erasure coding operation
+	baseTime := 30 * time.Second
+
+	// Could adjust based on volume size or other factors
+	return baseTime
+}