Enhance template placeholder functionality: Updated the TemplateService to support new placeholders for page content, title, and excerpt. Modified related components and views to utilize these placeholders, improving dynamic content rendering. Added special placeholder buttons in the placeholder picker for easier insertion.

app/Http/Controllers/PageController.php

@@ -74,7 +74,8 @@ class PageController extends Controller
             
             $renderedHeader = TemplateService::replacePlaceholders(
                 $page->headerTemplate->html_content,
-                $mergedHeaderData
+                $mergedHeaderData,
+                $page
             );
         }
 
@@ -88,7 +89,8 @@ class PageController extends Controller
             
             $renderedFooter = TemplateService::replacePlaceholders(
                 $page->footerTemplate->html_content,
-                $mergedFooterData
+                $mergedFooterData,
+                $page
             );
         }
 
@@ -154,7 +156,8 @@ public function show($slug)
             
             $renderedHeader = TemplateService::replacePlaceholders(
                 $page->headerTemplate->html_content,
-                $mergedHeaderData
+                $mergedHeaderData,
+                $page
             );
         }
 
@@ -168,7 +171,8 @@ public function show($slug)
             
             $renderedFooter = TemplateService::replacePlaceholders(
                 $page->footerTemplate->html_content,
-                $mergedFooterData
+                $mergedFooterData,
+                $page
             );
         }