Enhance Telegram bot with database integration and API features

- Added SQLite database support with Alembic for migrations.
- Implemented FastAPI for HTTP API to manage duties.
- Updated configuration to include database URL and HTTP port.
- Created entrypoint script for Docker to handle migrations and permissions.
- Expanded command handlers to register users and display duties.
- Developed a web application for calendar display of duties.
- Included necessary Pydantic schemas and SQLAlchemy models for data handling.
- Updated requirements.txt to include new dependencies for FastAPI and SQLAlchemy.

webapp/style.css

@@ -0,0 +1,152 @@
+:root {
+  --bg: #1a1b26;
+  --surface: #24283b;
+  --text: #c0caf5;
+  --muted: #565f89;
+  --accent: #7aa2f7;
+  --duty: #9ece6a;
+  --today: #bb9af7;
+}
+
+* {
+  box-sizing: border-box;
+}
+
+body {
+  margin: 0;
+  padding: 0;
+  font-family: system-ui, -apple-system, sans-serif;
+  background: var(--bg);
+  color: var(--text);
+  min-height: 100vh;
+  -webkit-tap-highlight-color: transparent;
+}
+
+.container {
+  max-width: 420px;
+  margin: 0 auto;
+  padding: 12px;
+  padding-bottom: env(safe-area-inset-bottom, 12px);
+}
+
+.header {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  margin-bottom: 12px;
+}
+
+.nav {
+  width: 40px;
+  height: 40px;
+  border: none;
+  border-radius: 10px;
+  background: var(--surface);
+  color: var(--accent);
+  font-size: 24px;
+  line-height: 1;
+  cursor: pointer;
+}
+
+.nav:active {
+  opacity: 0.8;
+}
+
+.title {
+  margin: 0;
+  font-size: 1.1rem;
+  font-weight: 600;
+}
+
+.weekdays {
+  display: grid;
+  grid-template-columns: repeat(7, 1fr);
+  gap: 2px;
+  margin-bottom: 6px;
+  font-size: 0.75rem;
+  color: var(--muted);
+  text-align: center;
+}
+
+.calendar {
+  display: grid;
+  grid-template-columns: repeat(7, 1fr);
+  gap: 4px;
+  margin-bottom: 16px;
+}
+
+.day {
+  aspect-ratio: 1;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: flex-start;
+  padding: 4px;
+  border-radius: 8px;
+  font-size: 0.85rem;
+  background: var(--surface);
+}
+
+.day.other-month {
+  opacity: 0.4;
+}
+
+.day.today {
+  background: var(--today);
+  color: var(--bg);
+}
+
+.day.has-duty .num {
+  font-weight: 700;
+}
+
+.day-duties {
+  font-size: 0.6rem;
+  color: var(--duty);
+  margin-top: 2px;
+  max-width: 100%;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.duty-list {
+  font-size: 0.9rem;
+}
+
+.duty-list h2 {
+  font-size: 0.85rem;
+  color: var(--muted);
+  margin: 0 0 8px 0;
+}
+
+.duty-item {
+  padding: 8px 10px;
+  margin-bottom: 6px;
+  border-radius: 8px;
+  background: var(--surface);
+  border-left: 3px solid var(--duty);
+}
+
+.duty-item .name {
+  font-weight: 600;
+}
+
+.duty-item .time {
+  font-size: 0.8rem;
+  color: var(--muted);
+}
+
+.loading, .error {
+  text-align: center;
+  padding: 12px;
+  color: var(--muted);
+}
+
+.error {
+  color: #f7768e;
+}
+
+.error[hidden], .loading.hidden {
+  display: none !important;
+}