move container max-width configuration to theme

src/renderer/components/page-header/page-header.module.css

@@ -81,6 +81,8 @@
 .title-wrapper {
     position: absolute;
     display: flex;
+    align-items: center;
+    justify-content: center;
     width: 100%;
     height: 100%;
 }

src/renderer/features/shared/components/library-container.module.css

@@ -1,7 +1,7 @@
 .container {
     position: relative;
     width: 100%;
-    max-width: 1600px;
+    max-width: var(--theme-content-max-width);
     margin: 0 auto;
 }
 

src/renderer/features/shared/components/library-header-bar.module.css

@@ -4,6 +4,7 @@
     gap: 1rem;
     align-items: center;
     width: 100%;
+    max-width: var(--theme-content-max-width);
     height: 100%;
     padding: 0 1rem;
 }