Admin UI: Fetch task logs (#7114)

* show task details

* loading tasks

* task UI works

* generic rendering

* rendering the export link

* removing placementConflicts from task parameters

* remove TaskSourceLocation

* remove "Server ID" column

* rendering balance task source

* sources and targets

* fix ec task generation

* move info

* render timeline

* simplified worker id

* simplify

* read task logs from worker

* isValidTaskID

* address comments

* Update weed/worker/tasks/balance/execution.go

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update weed/worker/tasks/erasure_coding/ec_task.go

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update weed/worker/tasks/task_log_handler.go

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* fix shard ids

* plan distributing shard id

* rendering planned shards in task details

* remove Conflicts

* worker logs correctly

* pass in dc and rack

* task logging

* Update weed/admin/maintenance/maintenance_queue.go

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

* display log details

* logs have fields now

* sort field keys

* fix link

* fix collection filtering

* avoid hard coded ec shard counts

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

weed/worker/tasks/base/typed_task.go

@@ -16,7 +16,8 @@ type BaseTypedTask struct {
 	taskType         types.TaskType
 	taskID           string
 	progress         float64
-	progressCallback func(float64)
+	progressCallback func(float64, string)
+	currentStage     string
 	cancelled        bool
 	mutex            sync.RWMutex
 
@@ -75,21 +76,49 @@ func (bt *BaseTypedTask) GetProgress() float64 {
 func (bt *BaseTypedTask) SetProgress(progress float64) {
 	bt.mutex.Lock()
 	callback := bt.progressCallback
+	stage := bt.currentStage
 	bt.progress = progress
 	bt.mutex.Unlock()
 
 	if callback != nil {
-		callback(progress)
+		callback(progress, stage)
 	}
 }
 
 // SetProgressCallback sets the progress callback function
-func (bt *BaseTypedTask) SetProgressCallback(callback func(float64)) {
+func (bt *BaseTypedTask) SetProgressCallback(callback func(float64, string)) {
 	bt.mutex.Lock()
 	defer bt.mutex.Unlock()
 	bt.progressCallback = callback
 }
 
+// SetProgressWithStage sets the current progress with a stage description
+func (bt *BaseTypedTask) SetProgressWithStage(progress float64, stage string) {
+	bt.mutex.Lock()
+	callback := bt.progressCallback
+	bt.progress = progress
+	bt.currentStage = stage
+	bt.mutex.Unlock()
+
+	if callback != nil {
+		callback(progress, stage)
+	}
+}
+
+// SetCurrentStage sets the current stage description
+func (bt *BaseTypedTask) SetCurrentStage(stage string) {
+	bt.mutex.Lock()
+	defer bt.mutex.Unlock()
+	bt.currentStage = stage
+}
+
+// GetCurrentStage returns the current stage description
+func (bt *BaseTypedTask) GetCurrentStage() string {
+	bt.mutex.RLock()
+	defer bt.mutex.RUnlock()
+	return bt.currentStage
+}
+
 // SetLoggerConfig sets the logger configuration for this task
 func (bt *BaseTypedTask) SetLoggerConfig(config types.TaskLoggerConfig) {
 	bt.mutex.Lock()
@@ -200,8 +229,8 @@ func (bt *BaseTypedTask) ValidateTyped(params *worker_pb.TaskParams) error {
 	if params.VolumeId == 0 {
 		return errors.New("volume_id is required")
 	}
-	if params.Server == "" {
-		return errors.New("server is required")
+	if len(params.Sources) == 0 {
+		return errors.New("at least one source is required")
 	}
 	return nil
 }