feat: command handlers

Add all 11 Telegraf command handler files (tasks 12–16): log, skip, status, history, streak, snooze, settings-cmd, progress, next, reschedule, chat, and setup (including multi-step onboarding flow).

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

src/bot/commands/skip.ts

@@ -0,0 +1,35 @@
+import type { Context } from 'telegraf';
+import type { Database } from 'better-sqlite3';
+import { todayString } from '../../utils/date';
+import { getScheduleByDate, updateScheduleStatus } from '../../db/schedule';
+import { getSessionByDate } from '../../db/sessions';
+
+export function handleSkip(db: Database) {
+  return async (ctx: Context) => {
+    const text = (ctx.message as { text?: string })?.text ?? '';
+    const reason = text.split(/\s+/).slice(1).join(' ') || null;
+
+    const today = todayString();
+
+    const session = getSessionByDate(db, today);
+    if (session) {
+      await ctx.reply(`You already logged a session today (${session.duration_min}m). Nothing to skip.`);
+      return;
+    }
+
+    const scheduled = getScheduleByDate(db, today);
+    if (!scheduled) {
+      await ctx.reply('No session scheduled for today anyway.');
+      return;
+    }
+
+    if (scheduled.status !== 'pending') {
+      await ctx.reply(`Today's session is already marked as ${scheduled.status}.`);
+      return;
+    }
+
+    updateScheduleStatus(db, today, 'skipped', reason);
+    const msg = reason ? `Skipped today (${reason}). The AI will account for this next time you reschedule.` : 'Skipped today. The AI will account for this next time you reschedule.';
+    await ctx.reply(msg);
+  };
+}