chore(spec): regenerate the four drifted declaration files on the merged tree

Baseline drift, not a code change — the fourth sync lap on this branch. Main's
#19226 and #19235 moved `packages/spec/api-surface-declarations/{data,root,
system,ui}.txt`, and that directory is a `merge=os-regen` path, so the merge
produced four files current for neither side.

Regenerated from a real build of the merged tree (34/34 declaration files
emitted; ⛔ no `OS_SKIP_DTS`), via `scripts/pm/os-regen-merge.sh`, with
`MERGE_HEAD` confirmed absent first — the build opens with `gen:schema`, and
running that in MERGE state is the anchor-rollback trap.

⚠️ The `MM` grade was live here and was read on purpose. After regenerating,
the index held main's side (803/535) while the worktree held the regeneration
(323/4); a bare `git commit` would have landed the index. `git add -A` first,
then `git diff --cached` re-read as the 323/4 it should be, and every one of the
four index blobs hash-matches its worktree file.

BOTH SIDES asserted by quoted-exact name over the WHOLE TREE with paths printed,
then again against the index blobs, with a dark control reading 0 files:
this branch's facade signature and prescription constant; #19226's
`DEFAULT_VIEW_ROW_LIMIT`, `KanbanConfigParsed` and the three
`ui/{Gallery,Kanban,Timeline}Config:limit` keys; #19235's
`RecordRelatedListProps.columns[number]` and `z.array(ListColumnSchema)`; and
#19219's `ObjectTimelinePropsSchema` carried forward. Note the three `limit`
keys live ONLY in `authorable-surface/ui.json` and `authorable-defaults/ui.json`
and the related-list row ONLY in `content/docs/references/ui/component.mdx` —
a grep scoped to the declaration files reads 0 for them out of range, not loss.

Claude-Session: https://claude.ai/code/session_01JbZnqu8bt6YqfJsr9vaFb3
Co-authored-by: Claude <noreply@anthropic.com>

Author: claude

packages/spec/api-surface-declarations/data.txt

@@ -17319,6 +17319,7 @@ declare const ObjectSchema: z.ZodObject<{
             }>>;
             titleField: z.ZodOptional<z.ZodString>;
             visibleFields: z.ZodOptional<z.ZodArray<z.ZodString>>;
+            limit: z.ZodDefault<z.ZodNumber>;
         }, z.core.$strict>>;
         chart: z.ZodOptional<z.ZodObject<{
             chartType: z.ZodDefault<z.ZodEnum<{
@@ -17369,6 +17370,7 @@ declare const ObjectSchema: z.ZodObject<{
             summarizeField: z.ZodOptional<z.ZodString>;
             titleField: z.ZodOptional<z.ZodString>;
             columns: z.ZodArray<z.ZodString>;
+            limit: z.ZodDefault<z.ZodNumber>;
         }, z.core.$strict>>;
         gantt: z.ZodOptional<z.ZodObject<{
             startDateField: z.ZodString;
@@ -17449,6 +17451,7 @@ declare const ObjectSchema: z.ZodObject<{
                 week: "week";
                 quarter: "quarter";
             }>>;
+            limit: z.ZodDefault<z.ZodNumber>;
         }, z.core.$strict>>;
         calendar: z.ZodOptional<z.ZodObject<{
             startDateField: z.ZodString;
@@ -19419,6 +19422,7 @@ declare const ObjectSchema: z.ZodObject<{
             gallery?: {
                 coverFit: "cover" | "contain";
                 cardSize: "small" | "medium" | "large";
+                limit: number;
                 coverField?: string | undefined;
                 titleField?: string | undefined;
                 visibleFields?: string[] | undefined;
@@ -19446,6 +19450,7 @@ declare const ObjectSchema: z.ZodObject<{
             kanban?: {
                 groupByField: string;
                 columns: string[];
+                limit: number;
                 summarizeField?: string | undefined;
                 titleField?: string | undefined;
             } | undefined;
@@ -19509,6 +19514,7 @@ declare const ObjectSchema: z.ZodObject<{
                 startDateField: string;
                 titleField: string;
                 scale: "year" | "month" | "day" | "hour" | "week" | "quarter";
+                limit: number;
                 endDateField?: string | undefined;
                 groupByField?: string | undefined;
                 colorField?: string | undefined;
@@ -20574,6 +20580,7 @@ declare const ObjectSchema: z.ZodObject<{
             gallery?: {
                 coverFit: "cover" | "contain";
                 cardSize: "small" | "medium" | "large";
+                limit: number;
                 coverField?: string | undefined;
                 titleField?: string | undefined;
                 visibleFields?: string[] | undefined;
@@ -20601,6 +20608,7 @@ declare const ObjectSchema: z.ZodObject<{
             kanban?: {
                 groupByField: string;
                 columns: string[];
+                limit: number;
                 summarizeField?: string | undefined;
                 titleField?: string | undefined;
             } | undefined;
@@ -20664,6 +20672,7 @@ declare const ObjectSchema: z.ZodObject<{
                 startDateField: string;
                 titleField: string;
                 scale: "year" | "month" | "day" | "hour" | "week" | "quarter";
+                limit: number;
                 endDateField?: string | undefined;
                 groupByField?: string | undefined;
                 colorField?: string | undefined;