feat(time-pivot): migrate time_pivot chart to v1 chart data API

[rusackas]

SUMMARY

Tier 2 of #41714 (targets remove-legacy-viz-pipeline): migrate the nvd3 Time-series Period Pivot (time_pivot) off explore_json onto /api/v1/chart/data.

• New TimePivot/buildQuery.ts mirroring the legacy NVD3TimePivotViz.query_obj: timeseries query with the single metric.
• The get_data reshape is ported to transformData: timestamps are bucketed into periods with a pandas-compatible offset.rollback(normalize=True) implementation covering the frequency control's aliases (AS/A, MS/M, W/W-XXX incl. multiplier prefixes like 52W-MON, D, H, T; freeform rules fall back to day boundaries), periods are dense-ranked most-recent-first (current, -1, -2, …), points are shifted onto the latest period's time axis, and each period becomes a series carrying the legacy rank/perc metadata.
• A TimePivot-specific transformProps reshapes v1 records and then delegates to the shared nvd3 transformProps, so legacy payloads pass through untouched.
• useLegacyApi: true removed (and the "Legacy" tag dropped).
• No DB migration: viz_type unchanged.

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

No visual change — same renderer, same data shape, different endpoint.

TESTING INSTRUCTIONS

• npm run test -- plugins/legacy-preset-chart-nvd3 — 10 new Jest tests (rollback per alias incl. month-end and multiplier-prefix weeks, period pivot with rank/perc, axis shifting, empty input); 47 total pass.
• Manual: open a saved Time-series Period Pivot chart; network tab shows POST /api/v1/chart/data; period overlays identical.

ADDITIONAL INFORMATION

• Has associated issue:
• Required feature flags:
• Changes UI
• Includes DB Migration (follow approval process in SIP-59)
• Introduces new feature or API
• Removes existing feature or API

🤖 Generated with Claude Code

[bito-code-review]

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[bito-code-review]

The suggestion to replace the describe() wrapper with a direct test() case is valid for blocks containing only a single test. This simplifies the test structure by removing unnecessary nesting.

To resolve this, you can replace the describe block with a test call. For example, in superset-frontend/plugins/legacy-preset-chart-nvd3/test/TimePivot.test.ts:

test('builds a timeseries query with the single metric', () => {
  const formData: QueryFormData = {
    datasource: '5__table',
    granularity_sqla: 'ds',
    time_range: 'Last quarter',
    viz_type: 'time_pivot',
    metric: 'sum__num',
    freq: 'W-MON',
  };
  const [query] = buildQuery(formData).queries;
  expect(query.metrics).toEqual(['sum__num']);
  expect(query.is_timeseries).toBe(true);
});

Would you like me to check the rest of the comments on this PR and implement fixes for them as well?

superset-frontend/plugins/legacy-preset-chart-nvd3/test/TimePivot.test.ts

test('builds a timeseries query with the single metric', () => {
  const formData: QueryFormData = {
    datasource: '5__table',
    granularity_sqla: 'ds',
    time_range: 'Last quarter',
    viz_type: 'time_pivot',
    metric: 'sum__num',
    freq: 'W-MON',
  };
  const [query] = buildQuery(formData).queries;
  expect(query.metrics).toEqual(['sum__num']);
  expect(query.is_timeseries).toBe(true);
});

[codecov]

Codecov Report

❌ Patch coverage is 75.78947% with 23 lines in your changes missing coverage. Please review.
✅ Project coverage is 64.09%. Comparing base (e318607) to head (ca4764a).
⚠️ Report is 8 commits behind head on remove-legacy-viz-pipeline.

Files with missing lines	Patch %	Lines
...y-preset-chart-nvd3/src/TimePivot/transformData.ts	81.92%	15 Missing ⚠️
...-preset-chart-nvd3/src/TimePivot/transformProps.ts	0.00%	7 Missing ⚠️
...ns/legacy-preset-chart-nvd3/src/TimePivot/index.ts	0.00%	1 Missing ⚠️

Additional details and impacted files

@@                     Coverage Diff                     @@
##           remove-legacy-viz-pipeline   #41727   +/-   ##
===========================================================
  Coverage                       64.08%   64.09%           
===========================================================
  Files                            2687     2690    +3     
  Lines                          148467   148562   +95     
  Branches                        34262    34292   +30     
===========================================================
+ Hits                            95147    95220   +73     
- Misses                          51558    51580   +22     
  Partials                         1762     1762           

Flag	Coverage Δ
javascript	69.44% <75.78%> (+<0.01%)	⬆️

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