feat: add configurable Polaris dashboard URL setting

- Add getDashboardUrl() and setDashboardUrl() functions to polaris.ts
- Update PolarisSettings with dashboard URL input field
- Replace hardcoded POLARIS_DASHBOARD_PROXY with configurable getPolarisProxyUrl()
- Increase namespace detail panel width to 800px
- Remove unused 'Skipped' field from overview dashboard
- Version bump to 0.2.2

Generated with [Claude Code](https://claude.ai/code)
via [Happy](https://happy.engineering)

Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Happy <yesreply@happy.engineering>

src/components/DashboardView.tsx

@@ -26,7 +26,6 @@ function OverviewSection(props: { data: AuditData; counts: ResultCounts }) {
     { name: 'Pass', value: counts.pass, fill: COLORS.pass },
     { name: 'Warning', value: counts.warning, fill: COLORS.warning },
     { name: 'Danger', value: counts.danger, fill: COLORS.danger },
-    { name: 'Skipped', value: counts.skipped, fill: COLORS.skipped },
   ];
 
   return (
@@ -51,14 +50,6 @@ function OverviewSection(props: { data: AuditData; counts: ResultCounts }) {
               name: 'Danger',
               value: <StatusLabel status="error">{counts.danger}</StatusLabel>,
             },
-            {
-              name: 'Skipped',
-              value: (
-                <span title="Only counts checks with Severity=ignore. Annotation-based exemptions are not included.">
-                  {counts.skipped}
-                </span>
-              ),
-            },
           ]}
         />
       </SectionBox>