feat: Sprint 3 frontend dashboards with Alpine.js + Jinja2
- Login page with JWT auth and role-based redirect
- CS Dashboard: KPI cards, priority breakdown, recent tickets
- FM Dashboard: tech workload, aging analysis, emergency alerts
- CEO Dashboard: executive KPIs, charts, risk indicators
- All Issues: filterable/sortable ticket table with pagination
- Create Issue: form with category tree, property/unit selector, photo uploads
- Issue Detail: full timeline, photo gallery, SLA status, action modals
- Role-based nav bar: CS/FM/Executive links adapt to user role
- Base template: shared Alpine.js app state, toast notifications, loading overlay
root
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