feat(workspace): refine career workflows

Make job/CV comparisons language-aware and filter recruitment noise. Improve responsive career navigation, shared spacing, dashboard priorities, settings, localized workspace controls, and portable browser tests.

job-tracker-ui/src/theme.ts

@@ -250,9 +250,24 @@ export const getTheme = (_mode: "light" | "dark") => {
   theme.components = {
     MuiCssBaseline: {
       styleOverrides: {
+        ":root": {
+          "--app-page-gutter": "16px",
+          "--app-section-gap": "24px",
+          "--app-card-padding": "16px",
+        },
+        "@media (min-width: 768px)": {
+          ":root": {
+            "--app-page-gutter": "24px",
+            "--app-card-padding": "20px",
+          },
+        },
+        "@media (min-width: 1440px)": {
+          ":root": { "--app-page-gutter": "32px" },
+        },
         body: {
           WebkitFontSmoothing: "antialiased",
           MozOsxFontSmoothing: "grayscale",
+          overflowX: "hidden",
         },
         // A global floor under every animation added this session (card hover-lift,
         // MUI's own Dialog/Menu/Collapse transitions, ripple) -- users who set this OS/