refine: sharper corners, minimal status indicator, no metric boxes

- theme: borderRadius 8→4 (cascades to all MUI components)
- PropertyIntelligenceCard: status pill → plain dot+text (no bg/border)
- OCCUPIED status: green → neutral gray (rented = expected, no signal needed)
- metric cells: remove box decoration, whitespace-only separation
- metric labels: lowercase, no uppercase/letter-spacing
- status placed inline next to location, saving vertical space

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/lib/theme.ts

@@ -45,7 +45,7 @@ export const theme = createTheme({
     overline: { fontSize: '0.6875rem', fontWeight: 600, letterSpacing: '0.08em', textTransform: 'uppercase' },
     button: { fontSize: '0.8125rem', fontWeight: 600, textTransform: 'none' },
   },
-  shape: { borderRadius: 8 },
+  shape: { borderRadius: 4 },
   shadows: [
     'none',
     '0 1px 2px rgba(0,0,0,0.05)',
@@ -78,7 +78,7 @@ export const theme = createTheme({
     MuiButton: {
       defaultProps: { disableElevation: true },
       styleOverrides: {
-        root: { borderRadius: 6, padding: '6px 16px' },
+        root: { borderRadius: 4, padding: '6px 16px' },
         contained: {
           '&.MuiButton-containedPrimary': {
             background: '#152642',
@@ -89,7 +89,7 @@ export const theme = createTheme({
     },
     MuiChip: {
       styleOverrides: {
-        root: { borderRadius: 6, fontSize: '0.75rem', fontWeight: 500, height: 22 },
+        root: { borderRadius: 4, fontSize: '0.75rem', fontWeight: 500, height: 22 },
       },
     },
     MuiTableCell: {