Rename button and add explanatory blurb to AI price check page

- Button: 'Run/Re-run Price Check' -> 'Analyze Catalog with AI'
- Add info card explaining what the analysis does, verdict meanings,
  and the disclaimer to verify operating costs before running

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

src/PowderCoating.Web/Views/CatalogItems/AiPriceCheck.cshtml

@@ -98,7 +98,7 @@
     {
         <div class="text-end">
             <button class="btn btn-primary" disabled>
-                <i class="bi bi-robot me-2"></i>Re-run Price Check
+                <i class="bi bi-robot me-2"></i>Analyze Catalog with AI
             </button>
             <div class="small text-muted mt-1">Next run available: @ViewBag.NextRunAvailable</div>
         </div>
@@ -109,8 +109,7 @@
             @Html.AntiForgeryToken()
             <button type="submit" class="btn btn-primary" id="runBtn"
                     data-item-count="@(ViewBag.ActiveItemCount ?? 0)">
-                <i class="bi bi-robot me-2"></i>
+                <i class="bi bi-robot me-2"></i>Analyze Catalog with AI
-                @(Model == null ? "Run Price Check" : "Re-run Price Check")
             </button>
         </form>
     }
@@ -135,20 +134,52 @@
     </div>
 }
 
+<!-- What this does -->
+<div class="card mb-4 border-0 bg-light">
+    <div class="card-body">
+        <div class="d-flex gap-3">
+            <div class="flex-shrink-0 text-primary" style="font-size:1.75rem;"><i class="bi bi-info-circle"></i></div>
+            <div>
+                <h6 class="fw-semibold mb-1">What this analysis does</h6>
+                <p class="small text-muted mb-2">
+                    Claude reviews every active, priced item in your catalog against your shop's actual operating costs —
+                    labor, oven time, sandblasting, coating booth, and powder material. For each item it estimates a
+                    realistic surface area and processing time, calculates a cost floor, then compares that to your
+                    current price and returns one of four verdicts:
+                </p>
+                <div class="d-flex flex-wrap gap-2 mb-2">
+                    <span class="verdict-badge verdict-below-cost">Below Cost</span><span class="small text-muted align-self-center">— you're losing money on this item</span>
+                </div>
+                <div class="d-flex flex-wrap gap-2 mb-2">
+                    <span class="verdict-badge verdict-low">Thin Margin</span><span class="small text-muted align-self-center">— above cost floor but below your target margin</span>
+                </div>
+                <div class="d-flex flex-wrap gap-2 mb-2">
+                    <span class="verdict-badge verdict-high">High</span><span class="small text-muted align-self-center">— significantly above typical market rates</span>
+                </div>
+                <div class="d-flex flex-wrap gap-2 mb-3">
+                    <span class="verdict-badge verdict-ok">OK</span><span class="small text-muted align-self-center">— price is within a reasonable range</span>
+                </div>
+                <p class="small text-muted mb-0">
+                    <i class="bi bi-exclamation-triangle me-1 text-warning"></i>
+                    Results are estimates based on industry knowledge and your shop's rates. Always apply your own
+                    judgment before changing prices. Make sure your
+                    <a asp-controller="CompanySettings" asp-action="Index">operating costs</a> are up to date for the most accurate results.
+                    Analysis can be run once per quarter.
+                </p>
+            </div>
+        </div>
+    </div>
+</div>
+
 @if (Model == null)
 {
     <!-- Empty state -->
     <div class="card text-center py-5">
         <div class="card-body">
             <i class="bi bi-robot text-muted" style="font-size: 4rem;"></i>
-            <h4 class="mt-3">No price check has been run yet</h4>
+            <h4 class="mt-3">No analysis has been run yet</h4>
             <p class="text-muted mb-4">
-                Click <strong>Run Price Check</strong> above to have Claude review your entire catalog
+                Click <strong>Analyze Catalog with AI</strong> above to get started.
-                against your shop's operating costs. Each item receives a verdict and suggested price range.
-            </p>
-            <p class="text-muted small">
-                Make sure your <a asp-controller="CompanySettings" asp-action="Index">operating costs</a>
-                are up to date before running for the first time.
             </p>
         </div>
     </div>