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>

src/clj/auto_ap/ssr/components/data_grid.clj

@@ -45,10 +45,10 @@
     [:label {:for "checkbox-all", :class "sr-only"} "checkbox"]]])
 
 (defn data-grid-
-  [{:keys [headers thead-params id] :as params} & rest]
+  [{:keys [headers thead-params id footer-tbody] :as params} & rest]
   [:div.shrink.overflow-y-scroll
    [:table (merge {:class "w-full text-sm text-left text-gray-500 dark:text-gray-400 shrink"}
-                  (dissoc params :headers :thead-params))
+                  (dissoc params :headers :thead-params :footer-tbody))
     [:thead (update thead-params :class #(-> "text-xs text-gray-800 uppercase bg-gray-50 dark:bg-gray-700 dark:text-gray-400 group-[.raw]:sticky group-[.raw]:z-10 group-[.raw]:top-0"
                                              (hh/add-class (or % ""))))
      (into
@@ -56,7 +56,11 @@
       headers)]
     (into
      [:tbody {}]
-     rest)]])
+     rest)
+    ;; Optional second <tbody> (valid HTML) so callers can keep a stable,
+    ;; separately-swappable region in the same table -- e.g. totals rows that
+    ;; update without touching the input-bearing rows above them.
+    footer-tbody]])
 
 ;; needed for tailwind
 ;; lg:table-cell  md:table-cell