feat: DH-21344: Dropdown for input table enums

[dgodinez-dh]

Consumes the new Column Restriction JS API to add an dropdown cell renderer for input tables. The renderer is pass to Grid via a function in a registry in a context around IrisGrid. This will allow Enterprise to register more input table cell renderers.

[codecov]

Codecov Report

❌ Patch coverage is 32.20339% with 80 lines in your changes missing coverage. Please review.
✅ Project coverage is 50.76%. Comparing base (ab2439a) to head (3449614).
⚠️ Report is 6 commits behind head on main.

Files with missing lines	Patch %	Lines
packages/iris-grid/src/CellDropdownField.tsx	0.00%	50 Missing ⚠️
...-grid/src/key-handlers/RestrictedEditKeyHandler.ts	43.47%	13 Missing ⚠️
packages/iris-grid/src/IrisGridContextProvider.tsx	25.00%	6 Missing ⚠️
packages/iris-grid/src/IrisGridModel.ts	16.66%	5 Missing ⚠️
packages/grid/src/key-handlers/EditKeyHandler.ts	0.00%	3 Missing ⚠️
...ackages/iris-grid/src/CellInputRendererContext.tsx	57.14%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2704      +/-   ##
==========================================
+ Coverage   50.72%   50.76%   +0.03%     
==========================================
  Files         788      792       +4     
  Lines       44923    45069     +146     
  Branches    11447    11684     +237     
==========================================
+ Hits        22789    22878      +89     
- Misses      22115    22145      +30     
- Partials       19       46      +27     

Flag	Coverage Δ
unit	50.76% <32.20%> (+0.03%)	⬆️

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[Copilot]

Pull request overview

This PR introduces column-restriction–driven cell editors for input tables by adding a registry-based mechanism to @deephaven/grid, wiring that registry through @deephaven/iris-grid via context, and providing a default dropdown editor for string-list (enum-like) restrictions.

Changes:

• Add ColumnRestriction support and a cellInputRendererRegistry to @deephaven/grid to render custom cell editors based on restriction type.
• Add IrisGridContextProvider + default registry plumbing in @deephaven/iris-grid, including a dropdown editor (CellDropdownField) for string-list restrictions.
• Add an IrisGrid key handler to preserve existing values for restriction-backed editors when editing is initiated by typing.

Reviewed changes

Copilot reviewed 16 out of 16 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
packages/iris-grid/src/key-handlers/RestrictedEditKeyHandler.ts	Intercepts printable-key edits to open restriction-backed editors without overwriting existing values.
packages/iris-grid/src/key-handlers/index.ts	Exports the new key handler.
packages/iris-grid/src/IrisGridModel.ts	Adds getColumnRestriction and defines string-list restriction type helpers.
packages/iris-grid/src/IrisGridContextProvider.tsx	Combines theme + renderer registry into a single context IrisGrid can consume.
packages/iris-grid/src/IrisGrid.tsx	Switches IrisGrid to the combined context and passes the registry down to Grid.
packages/iris-grid/src/IrisGrid.scss	Adds styling so dropdown editors get a visible focus/outline treatment.
packages/iris-grid/src/index.ts	Exposes new context/provider and dropdown/editor context exports.
packages/iris-grid/src/CellInputRendererContext.tsx	Defines default renderer registry and maps string-list restrictions to the dropdown editor.
packages/iris-grid/src/CellDropdownField.tsx	Implements the dropdown cell editor using Spectrum Picker wrapper.
packages/iris-grid/src/CellDropdownField.scss	Styles dropdown editor to fit within grid cell geometry and visuals.
packages/grid/src/key-handlers/EditKeyHandler.ts	Adds Enter-to-start-editing behavior for editable cells.
packages/grid/src/index.ts	Re-exports CellInputField, renderer types, and GridModel types.
packages/grid/src/GridRendererTypes.ts	Adds CellInputRendererFn and CellInputRendererRegistry types.
packages/grid/src/GridModel.ts	Adds ColumnRestriction type and getColumnRestriction hook on models.
packages/grid/src/Grid.tsx	Uses cellInputRendererRegistry to render custom editors and sets CSS vars for editor styling.
packages/app-utils/src/components/AppBootstrap.tsx	Wraps app tree with IrisGridContextProvider to supply the combined context.

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[Copilot]

Pull request overview

Copilot reviewed 16 out of 16 changed files in this pull request and generated 4 comments.