perf(hem): stream the home page in three sections and trim its query plan (#1945)

Hem was one ~33-query render behind a single fallback: the greeting waited
for the slowest worklist scan, and the request also paid a sequential
bank_file_imports read after the batch, a second scan of the suggested
matches (getWorklistCounts counted the same 200 rows the pane listed) and
an awaited stale-dismissal delete on the read path.

- page.tsx awaits only what the greeting shell and the redirects need
  (settings, profile, agent profile, the Skatteverket flag); the notice
  line, the setup checklist and the Att göra + Fortsätt panes are async
  server components behind their own Suspense (hem-sections.tsx). RSC
  streaming applies to client navigations too, so the greeting paints
  first on every visit and each block fills in as its queries land.
- DashboardContent becomes the shell with three slots; HemNotices keeps
  the one client-side action (the wrong-account sign-out); HemSkeletons
  are the two fallbacks.
- getWorklistCounts accepts the suggested matches the caller is already
  fetching (a promise, so it stays parallel); listSuggestedMatches runs
  once at the scan cap and the pane shows the first five.
- countInboxDocuments runs its id chunks in one wave instead of N
  sequential round trips.
- getCompanyNotices takes deferReap; Hem passes Next's after() so the
  stale-dismissal delete runs after the response.
- bank_file_imports joins the checklist section's batch.

Tests: worklist aggregate (precomputed matches skip the rescan), notices
aggregate (deferReap receives the reap; the delete does not run inline
and runs when the task does).

Co-authored-by: Jakob Wennberg <311770904+jakobwennberg-oss@users.noreply.github.com>
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

lib/worklist/__tests__/aggregate.test.ts

@@ -37,6 +37,16 @@ describe('getWorklistCounts', () => {
     })
   })
 
+  it('takes the suggested-match count from a caller-supplied list instead of rescanning', async () => {
+    const { countSuggestedMatches } = await import('../categories')
+    const matches = [{ transactionId: 't1' }, { transactionId: 't2' }, { transactionId: 't3' }] as never[]
+    const { counts } = await getWorklistCounts(supabase, 'company-1', {
+      suggestedMatches: Promise.resolve(matches),
+    })
+    expect(counts.suggested_match).toBe(3)
+    expect(countSuggestedMatches).not.toHaveBeenCalled()
+  })
+
   it('excludes suggested_match from the total (subset of book_transaction)', async () => {
     const { total } = await getWorklistCounts(supabase, 'company-1')
     // 4 + 6 + 1 + 3 + 5 + 1 + 2 + 1, without the 2 suggested matches.