feat(election): candidate voter analysis — Chart.js charts, cross-dimension insights

- New CandidateAnalysisComponent with Chart.js doughnut charts for all
  demographic/financial/social dimensions (gender, age, area, caste,
  sub-caste, religion, occupation, share-holding, tenure, loan, education,
  marital status, monthly income, savings account depth)
- Section 4: Multi-Dimension Voter Alignment card showing core base
  (caste + area cross-match), caste %, area %, and savings engagement
- Candidate board: added Analyse button linking to analysis page
- Hero header, KPI strip, 4 dashboard sections with hover charts

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

src/app/election/election-routing.module.ts

@@ -81,6 +81,14 @@ const routes: Routes = [
               (m) => m.ElectionAuditLogComponent
             ),
           data: { title: 'Election Audit Log' }
+        },
+        {
+          path: ':electionId/candidates/:candidateId/analysis',
+          loadComponent: () =>
+            import('./components/candidate-analysis/candidate-analysis.component').then(
+              (m) => m.CandidateAnalysisComponent
+            ),
+          data: { title: 'Candidate Voter Analysis' }
         }
       ]
     }