Dashboard: Connect to real database and fix duplicate sections

Changes Made

• Connected dashboard to real SQLite database (was showing hardcoded fake data before)
• Metric cards now show live counts from database (Total, Verified, Open, Resolved)
• Reports by Category chart now pulls real data
• Report Status Overview chart now pulls real data
• Safety Hotspots now calculated from real submitted reports
• Recent Reports table now shows actual database records
• Community Insights now shows real top category and top location
• Removed duplicate Recent Reports section
• Removed duplicate Community Insights section
• Fixed database path issue caused by OneDrive blocking SQLite

Tested

• Dashboard loads successfully
• All metrics show correct numbers
• Charts render with real data
• Tested with 4 sample reports

Related

• Fixes Bug #3, #7, #8, #11 from code review