Add manufacturer to Log Material item combobox

Shows manufacturer name as muted secondary text in each dropdown row
and includes it in the search filter, so users can find a powder by
brand when multiple items share a similar name.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/PowderCoating.Web/wwwroot/js/log-material.js

@@ -40,6 +40,7 @@
         if (!dd) return;
         const filtered = query
             ? _items.filter(it => it.name.toLowerCase().includes(query) ||
+                                  (it.manufacturer && it.manufacturer.toLowerCase().includes(query)) ||
                                   (it.unitOfMeasure && it.unitOfMeasure.toLowerCase().includes(query)))
             : _items;
         if (filtered.length === 0) {
@@ -48,6 +49,7 @@
         }
         dd.innerHTML = filtered.map(it => {
             const label = it.name + (it.unitOfMeasure ? ' (' + it.unitOfMeasure + ')' : '');
+            const mfr = it.manufacturer ? `<span class="text-muted ms-1" style="font-size:.78rem;">${escLm(it.manufacturer)}</span>` : '';
             return `<div class="lm-item-opt" style="padding:.35rem .75rem;font-size:.875rem;cursor:pointer;"
                          data-id="${it.id}"
                          data-qty="${it.quantityOnHand}"
@@ -56,7 +58,7 @@
                          onmousedown="event.preventDefault(); lmComboSelect(this)"
                          onmouseenter="this.style.background='#f0f4ff'"
                          onmouseleave="this.classList.contains('lm-active') ? null : this.style.background=''">
-                    ${escLm(label)}
+                    ${escLm(label)}${mfr}
                 </div>`;
         }).join('');
     }