feat(ui): modern theme, dark/light toggle, polished templates

README.md

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+Zammad Reports (Flask)
+
+Quickstart
+
+- Create and activate venv (optional).
+- Install deps: pip install -r requirements.txt
+- Configure env variables (recommended):
+  - ZAMMAD_URL=https://task.4mont.ru
+  - ZAMMAD_TOKEN=your_token_here
+- Run: python app.py
+
+Environment
+
+- FLASK_SECRET_KEY: optional, for sessions/flash.
+- ZAMMAD_URL: base URL of Zammad (e.g. https://task.4mont.ru).
+- ZAMMAD_TOKEN: personal access token with API rights.
+
+Features
+
+- Totals: total, open vs closed.
+- Grouping: by agent (owner), by group, by state, by priority.
+- Trend: tickets per day in range.
+- HTML charts (bar/line) with Chart.js + Bootstrap UI.
+- JSON API: `/api/report.json` aggregates everything for the period.