Unit tests for QML Feature-specific components #362

Part of #356

Add unit tests in tests/qml/ for active feature components:

Tasks (qml/features/tasks/components/):

• TaskNameField.qml (name input validation)
• PersonalStageSelector.qml (personal stage changes)
• TaskStageSelector.qml (stage signals)
• TaskRecordActionsGrid.qml (action buttons)
• TaskDetailsCard.qml (task card info)
• MyTasksClosedIndicator.qml (closed status badge)
• TaskScheduleFields.qml (schedule dates and duration)
• TaskPrioritySelector.qml (priority dropdown)
• TaskList.qml (task list rendering)

Timesheets (qml/features/timesheets/components/):

• TimeRecorderWidget.qml (start, stop, pause actions)
• TimeSheetDetailsCard.qml (entry summary display)
• TimeSheetDescriptionPopup.qml (description edit popup)

Dashboard (qml/features/dashboard/components/ and charts/):

• TaskRow.qml (row presentation)
• ChartInfoPopup.qml (chart popup data)
• TaskChartCanvas.qml (canvas drawing logic)
• ProjectCard.qml (project card display)
• TaskTimeChart.qml (time chart model updates)

Settings (qml/features/settings/components/):

• SettingsHeader.qml (header text and back action)
• SettingsListItem.qml (settings item click)
• SettingsPageLayout.qml (settings layout container)

Note: TaskStagesDisplayGrid, TimeSheetGrid, and SettingsToggleItem are unused and scheduled for removal in #367.