refactor(ssr): Phase 5 — full Selmer migration of Invoice Bulk Edit; remove the wizard; implement live totals

Migrates the Invoice Bulk Edit modal off the wizard to a plain Selmer form,
building on the parity gate. Structurally Phase 3's bulk-code applied to invoices
(selected entities -> expense-account rows), so near-pure reuse of bulk-code's
flat-state plumbing + edit's account-totals-tbody.

What changed
- Wizard removed: deleted BulkEditWizard/AccountsStep records, MultiStepFormState,
  the step-params[...] prefix, the EDN snapshot, and all mm/* for this modal.
  Replaced with a plain handler + flat wrap-bulk-state (decode straight into
  bulk-edit-schema, no snapshot).
- Selection-as-ids round-trip: the non-editable invoice selection is resolved to a
  concrete not-locked id vector at open and ridden back in hidden ids[] fields (the
  bulk analog of edit's single db/id) -- no filter re-query.
- De-cursored bulk-edit-account-row* to Selmer (sc/*), explicit-id location swap
  (#account-location-<index>, replacing the old find * swap), reusing
  tx-edit/location-select*.
- 100% Selmer modal render path; the surgical edit was done with the text-based
  Edit tool (the clojure-mcp structural tools reformat the whole 1812-line file),
  so the diff is contained to the requires + the bulk-edit region.
- Routes 5 -> 3: GET bulk-edit, PUT bulk-edit-submit, POST bulk-edit-form-changed
  (one whole-form op dispatcher folding the old new-account route).

Implemented the dead totals
- The wizard's TOTAL/BALANCE percentage rows were commented out (#_(...)) with a
  duplicate id="total". Implemented as a #expense-totals sibling-<tbody> refreshed by
  a Rule-4 percentage-keyup swap (the new-account + total + balance routes all fold
  into form-changed / the sibling-tbody).

Scorecard delta (bulk-edit modal): wizard records 2->0, bulk-edit routes 5->3,
step-params/fc-cursor (modal) ->0, location swap find *-> explicit-id, totals
dead->implemented.

Verification: invoice-bulk-edit spec 5/5 (incl. add-row, save, validation, the
implemented totals); full Playwright suite 50/50; cljfmt clean; diff confined to
the modal region. Skill fed: scorecard row + settled repeated-row target-selector
convention; gotcha (structural tools reformat large files -> use text Edit).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.claude/skills/ssr-form-migration/reference/gotchas.md

@@ -253,6 +253,18 @@ A money/text input wired `hx-trigger="keyup changed delay:300ms"` does **not** f
 swap actually triggers. (A `change`-triggered control is the opposite — `dispatchEvent('change')`
 is fine there.)
 
+## clojure-mcp structural edits reformat the whole file — use text Edit in big shared files
+
+`clojure_edit` / `clojure_edit_replace_sexp` re-emit the **entire file** through the formatter.
+In a small single-modal file that's fine (cljfmt-clean output). In a **large multi-modal file**
+(Phase 5: `invoices.clj`, 1812 lines) a one-line require addition produced a **650-line spurious
+whitespace diff** that buries the real change and makes review impossible. For a surgical
+migration inside a big shared file, use the **text-based Edit tool** (exact-string match — no
+reformat); this is the AGENTS.md "edit Clojure with file tools only when absolutely necessary"
+carve-out. Verify with `load-file` (compile) + `lein cljfmt check`, not by eyeballing. Confirm the
+diff is contained with `git diff -U0 <file> | grep '^@@'` — the hunks should cluster only where you
+edited (requires + the modal region), nothing else.
+
 ## Scorecard exceptions (ratchet violations with a reason)
 
 **Heuristic 4 (LOC net ↓) — exception (Phase 3, Transaction Bulk Code: 420→506).** When the