fix: prevent source dialog action overlap (#1195)

* fix: prevent source dialog action overlap

* fix(sources): pad only the right of the detail header to clear close button

px-12 cleared the overlap but also indented the header's left edge 40px
past the tab content below (which stays px-2), misaligning the title. Keep
px-2 and add pr-12 so the header left-aligns with the body while the actions
menu still clears the dialog close button on the right.

---------

Co-authored-by: Luis Novo <lfnovo@gmail.com>

frontend/src/components/sources/SourceDetailContent.tsx

@@ -412,7 +412,7 @@ function SourceDetailContentInner({
   return (
     <div className="flex flex-col h-full">
       {/* Header */}
-      <div className="pb-4 px-2">
+      <div className="pb-4 px-2 pr-12">
         <div className="flex items-start justify-between">
           <div className="flex-1">
             <InlineEdit