[P3] Restore lint gates repo-wide (extend the fields/core baseline cleanup from #2709)

[os-zhuang]

Why

Several package lints are (or were) red at baseline on main — pre-existing errors that were never blocking, so the per-package lint gate silently could not catch new violations of the same class (e.g. a fresh react-hooks/rules-of-hooks bug would land green). #2709 restored @object-ui/fields and @object-ui/core to 0 errors; this issue extends that sweep to the rest of the workspace so every package's lint gate actually protects it again.

Concretely, @object-ui/core had been red long enough that a genuine hooks-order bug in ImageField (a useCallback after an early return) shipped unnoticed — exactly the kind of thing the gate exists to stop.

Scope

• Survey each package: pnpm --filter <pkg> lint (or pnpm -r lint) and record the error count + rule breakdown per package. Attach the list here as the work-plan.
• Fix the baseline errors (not warnings) package-by-package, smallest first. Prefer real fixes; use a scoped // eslint-disable-next-line <rule> with a justifying comment only where the code is deliberately correct (as done in feat(fields): select+multiple → multi-value chip picker; restore fields/core lint gates #2709 for the intentional no-control-regex filename range and the ES2020-lib preserve-caught-error).
• Each package as its own small PR (or a few grouped by owner) to keep review + parallel-agent conflict surface small — do not bundle into one mega-diff.
• Do not change lint config/rules to make errors disappear — fix the code. Rule changes, if ever warranted, are a separate deliberate decision.

Non-goals

• Warnings (no-explicit-any, react-refresh/only-export-components, etc.) — out of scope; errors only.
• Behavior changes — these are mechanical/lint-only fixes.

Acceptance

• pnpm -r lint is clean (0 errors) across the workspace, or each remaining red package has a tracked reason.
• No lint config was loosened to get there.

Refs

• feat(fields): select+multiple → multi-value chip picker; restore fields/core lint gates #2709 (fields/core baseline cleanup — the pattern to follow) · fix(app-shell): guard ActionParamDialog submit during file upload + map spec autonumber (ADR-0059 follow-ups) #2707 / [P3] SDUI: render ActionParamDialog params through the shared form field-widget renderer (retire bespoke per-type branches) #2700 / ADR-0059 (context)