Fix remaining lint warnings (82 total)

[pglevy]

Background

PR #131 fixed lint errors (hooks order violations, renderer import, brace-expansion), but 82 warnings remain across the codebase. These are all from two rules set to "warn" in eslint.config.js.

Summary

Rule	Count	Notes
@typescript-eslint/no-explicit-any	65	Mostly form field value/saveInto props and ReadOnlyGrid row data
@typescript-eslint/no-unused-vars	16	Mix of intentional _ prefix vars and actual dead code
react-hooks/exhaustive-deps	1	ReadOnlyGrid useMemo conditional

Root cause: _ prefix not respected

PR #131 introduced underscore-prefixed destructuring (_validationGroup, _data, _sort) to signal intentionally unused variables, but the ESLint config doesn't ignore that pattern. Fix:

"@typescript-eslint/no-unused-vars": ["warn", { argsIgnorePattern: "^_", varsIgnorePattern: "^_" }]

This alone eliminates ~12 of the 16 no-unused-vars warnings.

Actual dead code to clean up

These are real unused references (not intentional _ prefix):

• src/components/MessageBanner/MessageBanner.tsx — unused X import from lucide-react
• src/components/ReadOnlyGrid/ReadOnlyGrid.tsx — unused totalPages variable
• src/components/Tag/TagItem.tsx — unused _props parameter
• scripts/generate-css.ts — unused TokenGroup type
• scripts/token-server.ts — unused err in catch
• src/components/Dropdown/DropdownField.test.tsx — unused openDropdown
• src/components/RadioButton/RadioButtonField.test.tsx — unused container
• src/components/ReadOnlyGrid/ReadOnlyGrid.properties.test.tsx — unused matchingHeaders

Suggested approach

1. Fix ESLint config to respect _ prefix convention
2. Remove actual dead code (unused imports/variables listed above)
3. Leave no-explicit-any warnings as-is for now — address per-component over time (form fields may benefit from generics)
4. Fix the one react-hooks/exhaustive-deps warning in ReadOnlyGrid

Files with warnings

• scripts/generate-css.ts
• scripts/token-server.ts
• src/components/Button/ButtonWidget.tsx
• src/components/ButtonToggle/ButtonToggle.tsx
• src/components/Checkbox/CheckboxField.tsx
• src/components/Dialog/DialogField.test.tsx
• src/components/Dropdown/DropdownField.test.tsx
• src/components/Dropdown/DropdownField.tsx
• src/components/Dropdown/DropdownFieldBase.tsx
• src/components/Dropdown/MultipleDropdownField.tsx
• src/components/MessageBanner/MessageBanner.tsx
• src/components/Milestone/MilestoneField.tsx
• src/components/RadioButton/RadioButtonField.test.tsx
• src/components/RadioButton/RadioButtonField.tsx
• src/components/ReadOnlyGrid/GridColumn.tsx
• src/components/ReadOnlyGrid/ReadOnlyGrid.properties.test.tsx
• src/components/ReadOnlyGrid/ReadOnlyGrid.stories.tsx
• src/components/ReadOnlyGrid/ReadOnlyGrid.tsx
• src/components/Slider/SliderField.tsx
• src/components/Stamp/StampField.tsx
• src/components/Tag/TagItem.tsx
• src/components/Toggle/ToggleField.tsx