fix(ssr): repair New Invoice + Transaction Edit 500s and broken modal sizes

Three regressions from the SSR rendering-modernization migration, all verified
live via agent-browser:

- BUG A — New Invoice: choosing a client 500'd from /invoice/new/due-date
  (ClassCastException: DateTime cannot be cast to java.util.Date). `due-date`
  and `scheduled-payment-date` called `coerce/from-date` on values already
  decoded to clj-time DateTimes. Drop the coerce; use the decoded dates.

- BUG C — Transaction Edit: any whole-form swap (mode toggle, vendor change,
  add/remove row) 500'd whenever the txn had >=1 autopay-invoice match
  (ClassCastException at links-body*: PersistentVector cannot be cast to Named).
  The autopay link-panel's hidden `action` input was missing `:form ""`, so it
  serialized alongside the main `action` hidden, producing a duplicate param
  that Ring collapsed to a vector. Add `:form ""` to match the unpaid/rule panels.

- Modal sizes: Vendor/Client/Invoice-Pay modals ballooned to full width because
  resources/public/output.css was missing their arbitrary Tailwind size classes.
  Root cause: tailwind.config.js `content` never scanned resources/templates/**/*.html
  (46 Selmer templates the migration introduced), so a rebuild also dropped
  template-only classes like md:w-[950px]. Add the templates glob and rebuild;
  all modal size classes now present, no working modal regressed.

Docs: add 2026-06-27 QA findings + resumable fix task list; cross-link from the
migration plan. Remaining (per the new plan): Vendor/Client inner step-body
overflow, wizard step animations, bulk-edit empty-selection 500, footer EDN leak.

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

docs/plans/2026-06-02-001-refactor-ssr-rendering-modernization-plan.md

@@ -775,3 +775,13 @@ matches, emails, contact methods). Deliberately last, when the skill is richest.
 4. **First step** — start by distilling the skill (Phase 1) with the reference
    implementation merged as a prerequisite, rather than treating the merge
    itself as step one. *(recommended: yes)*
+
+---
+
+## 12. Post-migration QA follow-up (2026-06-27)
+
+A full agent-browser QA pass over the 9 migrated modals found size/animation/500 regressions.
+Findings, root causes (incl. the stale-Tailwind-CSS size root cause), and a prioritized fix
+task list live in:
+
+- **`docs/plans/2026-06-27-001-fix-ssr-modal-regressions-plan.md`**