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/progress.ts

@@ -0,0 +1,16 @@
+import type { Context } from 'telegraf';
+import type { Database } from 'better-sqlite3';
+import { todayString } from '../../utils/date';
+import { getProgressAnalysis } from '../../ai/coach';
+
+export function handleProgress(db: Database) {
+  return async (ctx: Context) => {
+    await ctx.reply('Analysing your recent history…');
+    try {
+      const result = await getProgressAnalysis(db, todayString());
+      await ctx.reply(result);
+    } catch (err) {
+      await ctx.reply(`AI unavailable: ${(err as Error).message}`);
+    }
+  };
+}