Cascading lookup (dependsOn) broken in forms: stays gated after parent is chosen; table picker bypasses the dependent filter #2215

Found while dogfooding examples/app-showcase in the framework repo (showcase_invoice: contact is Field.lookup('showcase_contact', { dependsOn: ['account'] })). Two independent breaks, both confirmed by source scan + browser repro against a source build.

Symptom 1 — dependent lookup stays gated forever after the parent is selected

Repro: New Invoice modal → pick an Account (chip "Northwind" shows) → the Contact lookup still renders the gated trigger "请先选择account" (data-testid="lookup-trigger-gated", disabled).

Root cause — the dependent values the gate reads are never the live form values:

• packages/fields/src/widgets/LookupField.tsx:287-290 — resolvedDependentValues = dependentValuesProp ?? ctx.formValues ?? ctx.data.
• SchemaRendererContext has no formValues member at all (packages/react/src/context/SchemaRendererContext.tsx — zero hits), so ctx.formValues is always undefined — dead code.
• The form renderer never injects the dependentValues prop: packages/components/src/renderers/form/form.tsx:719-730 passes dataSource: contextDataSource to the field widget but no dependentValues; stripRegisteredFieldProps (form.tsx:135-153) merely forwards the prop for lookup/master_detail/tree if someone upstream set it — nobody does.
• Net: the gate falls back to ctx.data (static record scope). In create mode that's {}, so dependenciesMissing (LookupField.tsx:295-301) is permanently true → the field can never be filled. In edit mode it's the saved record, so changing the parent in-form doesn't re-scope the child.

The form renderer already maintains a live watched snapshot for CEL rules (ruleRecord, form.tsx:275-288) — it just never hands it to lookup widgets.

Symptom 2 — the Level-2 table picker (browse-all) bypasses the cascade entirely

Repro: same modal, Account = Northwind already chosen → click the browse-all button next to Contact → dialog lists 121 records, page 1/13: Contoso/Fabrikam contacts, pagination-test contacts — everything. (It also opens fine while the field is still gated.)

Root cause:

• The dependent filter chain is only applied to the quick-select popover query (popoverFilter, LookupField.tsx:375-394).
• RecordPickerDialog gets only the static lookupFilters (LookupField.tsx:1098-1116) — the dependsOn chain is never merged in.
• The browse-all button (LookupField.tsx:1080-1091) has no disabled={dependenciesMissing}, unlike the main trigger (:807).

Fix direction

1. form.tsx: pass the live watched record (ruleRecord) as dependentValues to data-source field widgets, so the gate and the popover re-scope reactively.
2. LookupField.tsx: merge the dependsOn chain (param → value as eq filters) into what RecordPickerDialog receives, and gate the browse-all button on dependenciesMissing like the main trigger.