style(ui): float remaining table/card containers to design system

Repo-wide sweep for the same flat 1px-border "fake card" pattern
already fixed in Dashboard/Kanban/JobDetailsDialog/auth pages this
session -- AddJobModal, Attachments, CompaniesTable, Correspondence,
EditJobDialog, and the admin audit/system/users pages all had a table
container or content box using border+divider instead of the
floating-shadow treatment used everywhere else now.

Left AppShell.tsx/App.tsx alone -- their border:1px+divider instances
are icon-button and badge outlines, not card containers; that's a
different, correct use of the pattern.

job-tracker-ui/src/components/EditJobDialog.tsx

@@ -182,7 +182,7 @@ export default function EditJobDialog({ open, jobId, onClose, onSaved }: Props)
     <Dialog open={open} onClose={onClose} fullWidth maxWidth="md">
       <DialogTitle>{t("editJobTitle")}</DialogTitle>
       <DialogContent>
-        <Box sx={{ mt: 1, mb: 2, p: 1.5, borderRadius: 3, border: "1px solid", borderColor: "divider", backgroundColor: "background.paper" }}>
+        <Box sx={{ mt: 1, mb: 2, p: 1.5, borderRadius: 3, border: "none", boxShadow: "0px 1px 2px 0px rgba(15,23,42,0.04), 0px 8px 24px -12px rgba(15,23,42,0.12)", backgroundColor: "background.paper" }}>
           <Typography variant="body2" sx={{ color: "text.secondary" }}>
             {t("editJobIntro")}
           </Typography>