chore(launch-prep): hide unfinished report/import surfaces, defer big builds

Ship-what's-done prep ahead of the prod cutover (launch ~today):

- Hide Financial + Marketing report cards from the reports landing
  (both were "Builder in development" placeholders gated on unbuilt
  data sources). Sales/Operational/Custom + templates/scheduling/
  exports remain live.
- Trim the Custom-report card copy to match the shipped basic builder
  (no group-by/filters yet; the builder page header was already honest).
- Hide the Bulk Import mockup from search-nav-catalog + the admin
  sections browser; /admin/import is now unreachable from the UI.
- Correct client-facing doc over-claims (waiting-list "next-in-line
  notification", Import) in features-list.md + new-system-feature-summary.md.
- Un-stale BACKLOG.md (Documenso phases 2-7 confirmed shipped).
- Log decisions + deferred work (full importer, full custom-builder,
  waiting-list, maintenance-log, paper-upload bug) to launch-readiness.md.

Deferred-importer design spec added at
docs/superpowers/specs/2026-06-01-bulk-import-design.md.

Verified: tsc --noEmit clean, eslint clean on changed files,
1512/1519 vitest pass (7 failures are Redis-down, unrelated).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/components/admin/admin-sections-browser.tsx

@@ -15,7 +15,6 @@ import {
   FilePen,
   FileSignature,
   FileText,
-  FileUp,
   GitBranch,
   Home,
   Inbox,
@@ -258,12 +257,6 @@ const GROUPS: AdminGroup[] = [
         description: 'Review queue of suspected duplicate clients flagged by the dedup engine.',
         icon: CopyCheck,
       },
-      {
-        href: 'import',
-        label: 'Bulk Import',
-        description: 'CSV-driven imports for clients, yachts, and tenancies.',
-        icon: FileUp,
-      },
       {
         href: 'berths',
         label: 'Berths admin',