Add time display picker to Dashboard and Lite toolbars

[erikdarlingdata]

Summary

• Times picker on both Dashboard and Lite global toolbars: Server Time, Local Time, UTC
• All timestamp columns across all grids update instantly when switching modes
• Dashboard persists the preference via UserPreferencesService
• Uses existing ServerTimeConverter + ServerTimeHelper.CurrentDisplayMode — no new converters needed

Test plan

• Dashboard builds: 0 errors
• Lite builds: 0 errors
• Picker syncs with Settings window preference on load
• Switching modes refreshes all grid timestamps without re-querying

🤖 Generated with Claude Code

Summary by CodeRabbit

Release Notes

• New Features
  • Added a timestamp display mode selector allowing users to choose how times are displayed: Server Time, Local Time, or UTC.
  • User preference is automatically saved and persists across sessions.

[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

Run ID: 4719d473-a546-4404-8f32-5ca507b8d83b

📥 Commits

Reviewing files that changed from the base of the PR and between 85201a6 and d9e2c9e.

📒 Files selected for processing (5)

• Dashboard/Controls/QueryPerformanceContent.xaml.cs
• Dashboard/ServerTab.xaml
• Dashboard/ServerTab.xaml.cs
• Lite/Controls/ServerTab.xaml
• Lite/Controls/ServerTab.xaml.cs

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📝 Walkthrough

Walkthrough

The PR adds time-display mode selection controls and event handlers to both Dashboard and Lite variants, enabling users to switch between Server Time, Local Time, and UTC display formats. A new refresh method triggers DataGrid binding updates to force timestamp converter re-evaluation after mode changes.

Changes

Cohort / File(s)	Summary
Dashboard QueryPerformance Refresh Dashboard/Controls/QueryPerformanceContent.xaml.cs	Added RefreshGridBindings() method to refresh bindings for 7 DataGrids (QueryStats, ProcStats, QueryStore, QueryStoreRegressions, ActiveQueries, CurrentActiveQueries, LongRunningQueryPatterns).
Dashboard Time Display Mode Dashboard/ServerTab.xaml, Dashboard/ServerTab.xaml.cs	Added UI controls (ComboBox with Server Time/Local Time/UTC options) to ServerTab header toolbar; initialized selection based on ServerTimeHelper.CurrentDisplayMode; implemented TimeDisplayMode_SelectionChanged handler with mode mapping, preference persistence via _preferencesService, and DataGrid binding refresh via PerformanceTab.RefreshGridBindings().
Lite Time Display Mode Lite/Controls/ServerTab.xaml, Lite/Controls/ServerTab.xaml.cs	Added matching time-display mode selector UI and handler logic to Lite variant; initializes selection and triggers .Items.Refresh() on multiple DataGrids (query, procedure, store, blocked, deadlock, running jobs, collection health, log) to re-evaluate timestamp formatting.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~30 minutes

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feature/time-display-picker

📝 Coding Plan

• Generate coding plan for human review comments

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