- Add Heatmap tab to chart editor form with IconGrid3x3 icon
- Create HeatmapSeriesEditor with value expression (Y-axis) and
  count expression (intensity) inputs
- Add heatmap display type to displayTypeToActiveTab mapping
- Add heatmap preview rendering in ChartPreviewPanel
- Add heatmap tile rendering in DBDashboardPage
- Add heatmap validation: single series, required value expression
- Constrain heatmap to single series (no Add Series / ratio)

Co-authored-by: Alex Fedotyev <[email protected]>

…ormat, reduce chart whitespace

- When switching to Heatmap with a trace source, auto-fill value
  expression with getDurationMsExpression and set numberFormat to
  duration with factor 0.001 for proper Y-axis labels (4ms, 100ms, 1.2s)
- Pass numberFormat from config through to DBHeatmapChart in both
  ChartPreviewPanel and DBDashboardPage for correct tick formatting
- Reduce Stack gap in ChartContainer from default to 4px to minimize
  whitespace above the chart area

Co-authored-by: Alex Fedotyev <[email protected]>

Co-authored-by: Alex Fedotyev <[email protected]>

…ctivity in editor/dashboard

- Add effect to populate duration defaults when source changes while
  already in heatmap mode (not just when switching to heatmap tab)
- Disable drag-to-select and hide 'Click & Drag' prompt in Heatmap
  when onFilter is not provided (chart editor and dashboard contexts)
- Keep hover tooltip with Y/Count values for read-only inspection

Co-authored-by: Alex Fedotyev <[email protected]>

…ngs button for heatmap

- Fill Value field with getDurationMsExpression and Count field with
  count() when switching to Heatmap with a trace source (visible text,
  not just behind the scenes)
- Add Display Settings button below heatmap editor, same pattern as
  other chart types, opening ChartDisplaySettingsDrawer for number
  format configuration

Co-authored-by: Alex Fedotyev <[email protected]>

…hboards

- Extract HeatmapSettingsDrawer into shared component used by both
  search Event Deltas and chart editor/dashboard contexts
- Remove Value/Count fields from the main heatmap editor form — move
  them into the Heatmap Settings drawer (Scale, Value, Count)
- Replace 'Display Settings' button with 'Heatmap Settings' button
  that opens the same drawer as search Event Deltas gear icon
- Pass scaleType (log/linear) from form state through to DBHeatmapChart
  in preview panel and dashboard tiles
- Pre-populate Value with getDurationMsExpression and Count with count()
  from data source config, editable via Heatmap Settings

Co-authored-by: Alex Fedotyev <[email protected]>

…artContainer gap

- Add padding: [8,0,0,0] to uPlot options to reduce whitespace above
  the topmost Y-axis tick in heatmap charts
- Set lockScroll=false on HeatmapSettingsDrawer to prevent layout shift
  when opening settings inside a dashboard edit modal
- Restore ChartContainer gap to 'xs' (was incorrectly set to 4px
  affecting all chart types)

Co-authored-by: Alex Fedotyev <[email protected]>

…ChartContainer changes

- Wrap HeatmapSettingsDrawer in Portal so it doesn't participate in
  the flex layout of the editor form, preventing content shift when
  opening/closing settings in dashboard edit modal
- Revert ChartContainer gap/margin changes to preserve existing
  spacing for all chart types

Co-authored-by: Alex Fedotyev <[email protected]>

Pass autoRun to EditTimeChartForm in the dashboard edit modal so
saved charts (including heatmaps) render their preview immediately
when opened for editing, matching the Chart Explorer behavior.

Co-authored-by: Alex Fedotyev <[email protected]>

… layout shift

Move the HeatmapSettingsDrawer out of HeatmapSeriesEditor and render
it at the EditTimeChartForm top level (same pattern as
ChartDisplaySettingsDrawer). This prevents any DOM insertion from
affecting the flex layout between the settings button and run button
when the drawer opens/closes.

Co-authored-by: Alex Fedotyev <[email protected]>

…le form, revert ChartContainer

- Extract toHeatmapChartConfig() helper into DBHeatmapChart.tsx,
  eliminating duplicated config construction and unsafe casts in
  DBDashboardPage and ChartPreviewPanel
- Export HeatmapChartConfig and HeatmapSelectExtras types for typed
  access to countExpression and heatmapScaleType on select items
- Add useEffect to sync HeatmapSettingsDrawer form when defaultValues
  change (prevents stale closure when source changes while drawer open)
- Fully revert ChartContainer to original (no gap change)

Co-authored-by: Alex Fedotyev <[email protected]>

Co-authored-by: Alex Fedotyev <[email protected]>

- Narrow `heatmapScaleType` schema from `string` to `enum(['log','linear'])`,
  removing the defensive ternaries in DBHeatmapChart and EditTimeChartForm
  that were re-validating the value at runtime.
- Fix tab-switch bug: when entering Heatmap from Search, `select` was still a
  string when the heatmap-defaults branch checked for an array, so the
  defaults never applied and the query errored. Restructure the displayType-
  change effect so the Heatmap branch covers both string and array `select`.
- Drop redundant `as` cast in HeatmapSettingsDrawer scaleType handler in
  favor of an inline type guard.
- Add `showLegend` prop to DBHeatmapChart; enable it on the chart-editor
  preview and dashboard tile so the heatmap shows a compact gradient legend
  in the toolbar (search keeps its existing delta-chart legend).
- Migrate DBSearchHeatmapChart to use `toHeatmapChartConfig` instead of
  building the heatmap config inline, so all three call sites share the
  same transform.

Heatmap runs as two sequential ClickHouse queries (a bounds query feeding
min/max into a bucketed-counts query), so a single SQL preview misrepresents
what actually executes. Render both queries labeled in the editor's
"Generated SQL" accordion; the bucket query uses {min}/{max} placeholder
tokens since those literals are only known once the bounds query returns.

Also suppress the MV optimization indicator on the heatmap tab — neither of
the two queries is what the editor's chart config alone would produce, so
the indicator was misleading. Per Drew's review feedback on PR #2107.

Refactor: extract buildHeatmapBoundsConfig / buildHeatmapBucketConfig from
DBHeatmapChart's HeatmapContainer to top-level exports so the SQL preview
can reuse them. No behavioral change to the live chart.

Caught by CI lint (no-unused-vars). Local --quiet eslint missed these
because the rule severity differs locally.