feat(bot): add conversational DM assistant flow

apps/bot/src/i18n/locales/en.ts

@@ -112,6 +112,32 @@ export const enBotTranslations: BotTranslationCatalog = {
     hour: (count) => `${count} hour${count === 1 ? '' : 's'}`,
     minute: (count) => `${count} minute${count === 1 ? '' : 's'}`
   },
+  assistant: {
+    unavailable: 'The assistant is temporarily unavailable. Try again in a moment.',
+    noHousehold:
+      'I can help after your Telegram account is linked to a household. Open the household group and complete the join flow first.',
+    multipleHouseholds:
+      'You belong to multiple households. Open the target household from its group until direct household selection is added.',
+    rateLimited: (retryDelay) => `Assistant rate limit reached. Try again ${retryDelay}.`,
+    retryInLessThanMinute: 'in less than a minute',
+    retryIn: (parts) => `in ${parts}`,
+    hour: (count) => `${count} hour${count === 1 ? '' : 's'}`,
+    minute: (count) => `${count} minute${count === 1 ? '' : 's'}`,
+    paymentProposal: (kind, amount, currency) =>
+      `I can record this ${kind === 'rent' ? 'rent' : 'utilities'} payment: ${amount} ${currency}. Confirm or cancel below.`,
+    paymentClarification:
+      'I can help record that payment, but I need a clearer message. Mention whether it was rent or utilities, and include the amount if you did not pay the full current balance.',
+    paymentUnsupportedCurrency:
+      'I can only auto-confirm payment proposals in the current household billing currency for now. Use /payment_add if you need a different currency.',
+    paymentNoBalance: 'There is no payable balance to confirm for that payment type right now.',
+    paymentConfirmButton: 'Confirm payment',
+    paymentCancelButton: 'Cancel',
+    paymentConfirmed: (kind, amount, currency) =>
+      `Recorded ${kind === 'rent' ? 'rent' : 'utilities'} payment: ${amount} ${currency}`,
+    paymentCancelled: 'Payment proposal cancelled.',
+    paymentAlreadyHandled: 'That payment proposal was already handled.',
+    paymentUnavailable: 'That payment proposal is no longer available.'
+  },
   finance: {
     useInGroup: 'Use this command inside a household group.',
     householdNotConfigured: 'Household is not configured for this chat yet. Run /setup first.',