feat(web): migrate CRM screens to Ant Design Vue with central theme

Adopt ant-design-vue and a shared antdTheme for leads, pipeline, invoices, and shared form controls under strict single-page governance.

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/web/src/layouts/AppLayout.vue

@@ -1084,6 +1084,7 @@ onUnmounted(() => {
 
 .workspace {
   min-width: 0;
+  min-height: 100dvh;
   display: flex;
   flex-direction: column;
   position: relative;
@@ -1904,10 +1905,10 @@ onUnmounted(() => {
   display: grid;
   grid-template-columns: minmax(0, 1fr) auto;
   align-items: center;
-  gap: 1rem;
+  gap: 16px;
   min-width: 0;
-  /* همان فاصله بالای سایدبار شناور (14px) */
-  padding: 14px 1.5rem 0.85rem;
+  /* هم‌تراز با پدینگ ۱۶px محتوای workspace */
+  padding: 16px;
   position: sticky;
   top: 0;
   z-index: 20;
@@ -2113,18 +2114,29 @@ onUnmounted(() => {
 }
 
 .content {
-  padding: 0 1.5rem 1.5rem;
+  flex: 1 1 auto;
+  min-height: 0;
   min-width: 0;
+  display: flex;
+  flex-direction: column;
+  padding: 16px;
   overflow-x: clip;
 }
 
+/* ریشهٔ RouterView ارتفاع workspace را پر کند */
+.content > *:first-child {
+  flex: 1 1 auto;
+  min-height: 0;
+  min-width: 0;
+}
+
 @media (max-width: 1280px) and (min-width: 901px) {
   .content {
-    padding-inline: 1rem;
+    padding: 16px;
   }
 
   .desktop-topbar {
-    padding-inline: 1rem;
+    padding: 16px;
   }
 }
 
@@ -2253,7 +2265,7 @@ onUnmounted(() => {
   }
 
   .content {
-    padding: 1rem 0.85rem calc(1.25rem + var(--mobile-tabbar-h));
+    padding: 16px 16px calc(16px + var(--mobile-tabbar-h));
   }
 
   .notif-layer {