refactor(ssr): full Selmer migration of Transaction Edit; remove the wizard

Squashed Phase-2 SSR work: migrate the Transaction Edit modal's render path
entirely to Selmer templates (zero Hiccup in the render path), rip out the
multi-step wizard abstraction (EditWizard/LinksStep records, MultiStepFormState,
step-params[...] field names, mm/* middleware) in favor of a plain form with
flat derived state, and promote shared UI components to reusable Selmer partials
under resources/templates/components/. Adds the Selmer interop bridge, the
auto-ap.ssr.components.selmer (sc) wrapper library, and the ssr-form-migration
skill capturing the learnings.

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

project.clj

@@ -96,6 +96,7 @@
                   [org.clojure/core.async]]
 
                  [hiccup "2.0.0-alpha2"]
+                 [selmer "1.12.61"]
 
                  ;; needed for java 11
                  [javax.xml.bind/jaxb-api "2.4.0-b180830.0359"]