feat(uat-batch): M43 — form-template bindings + inline field history

Closes plan item 43 (Form-template fields bind to Interest/Client data —
autofill, override-preservation history, dual-surface audit trail).

Phase 1 — Editor:
- New bindable-fields catalog (src/lib/templates/bindable-fields.ts):
  client/yacht/interest paths, each tagged with the entity, column, and
  default input type. Source of truth for what can bind + what
  interest_field_history.field_path strings the writers should use.
- formFieldSchema gains optional bindTo, validated against the catalog
  as an allow-list (no arbitrary paths sneak through).
- form-template-form admin sheet: per-field "Bind to" dropdown grouped
  by entity, auto-derives label/key/type when a binding is picked,
  shows "Autofills from + writes back to {label} . {path}" badge.

Phase 2 — Runtime + history writes:
- supplemental-forms.service.applySubmission already wrote
  interest_field_history rows for client name/email/address from the
  earlier 0081 migration session. Extended to also capture phone +
  yacht (name, length, width, draft) diffs that were silently going
  to the entity without an audit row, and to push insert-path
  overrides for the no-existing-address case.
- Field paths aligned with the bindable-fields catalog so detail-page
  lookups work via exact-match WHERE field_path = ?.

Phase 3 — Inline history surface:
- New /api/v1/clients/[id]/field-history (mirror of the existing
  interests endpoint).
- shared/field-history: FieldHistoryProvider wraps a detail tab and
  fires a single keyed GET; FieldHistoryIcon consumes the context and
  renders a small clock affordance only when at least one override
  exists, opening a popover with the reverse-chrono diff list.
- Client + Interest detail Overview tabs wrapped in the provider;
  EditableRow gains an optional historyPath prop; ContactsEditor
  renders the icon next to the canonical primary email/phone.

1454/1454 vitest, tsc clean.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/app/api/v1/clients/[id]/field-history/route.ts

@@ -0,0 +1,35 @@
+import { NextResponse } from 'next/server';
+import { and, desc, eq } from 'drizzle-orm';
+
+import { withAuth, withPermission } from '@/lib/api/helpers';
+import { db } from '@/lib/db';
+import { interestFieldHistory } from '@/lib/db/schema';
+import { errorResponse } from '@/lib/errors';
+
+/**
+ * GET /api/v1/clients/[id]/field-history
+ *
+ * Returns every supplemental-form override that touched the client (rolling
+ * up across all of their interests), newest first. Powers the inline clock
+ * icon + popover on Client detail. Mirrors /interests/[id]/field-history.
+ */
+export const GET = withAuth(
+  withPermission('clients', 'view', async (_req, ctx, params) => {
+    try {
+      const rows = await db
+        .select()
+        .from(interestFieldHistory)
+        .where(
+          and(
+            eq(interestFieldHistory.portId, ctx.portId),
+            eq(interestFieldHistory.clientId, params.id!),
+          ),
+        )
+        .orderBy(desc(interestFieldHistory.createdAt))
+        .limit(100);
+      return NextResponse.json({ data: rows });
+    } catch (error) {
+      return errorResponse(error);
+    }
+  }),
+);