fix(bot): inherit workspace tsconfig in nested packages

[Jorel97]

Summary

• update nested packages/bot/* tsconfigs to extend the workspace base config at ../../../tsconfig.base.json
• normalize WhatsApp Baileys message timestamps before storing them as milliseconds
• skip WhatsApp messages with no remote JID instead of relying on a non-null assertion

Fixes #452.

Testing

• Not run locally; change was prepared through GitHub contents API in the projectless workspace.

[greptile-apps]

Greptile Summary

This PR fixes two independent bugs in the WhatsApp bot package and corrects a misconfigured TypeScript path shared across all packages/bot/* sub-packages.

• tsconfig path fix: All five packages/bot/*/tsconfig.json files were extending ../../tsconfig.base.json, which resolves to the non-existent packages/tsconfig.base.json; the correct depth is ../../../tsconfig.base.json pointing to the repo root.
• Timestamp normalization: Replaces a bare msg.messageTimestamp * 1000 with a toUnixMs helper that handles number, string (with Number.isFinite guard), Long-style objects, and nullish values, falling back to Date.now() in all unrecognized cases.
• remoteJid null guard: Replaces the non-null assertion msg.key.remoteJid! with an explicit if (!chatId) continue to safely skip messages that lack a remote JID.

Confidence Score: 5/5

Safe to merge — all three changes are targeted, defensive fixes with no regressions introduced.

The tsconfig path correction is mechanically verifiable. The timestamp helper covers every known Baileys type variant and falls back to Date.now() rather than propagating NaN. The remoteJid guard replaces a crash-prone non-null assertion with a safe skip.

No files require special attention.

Important Files Changed

Filename	Overview
packages/bot/whatsapp/src/index.ts	Adds toUnixMs helper with proper NaN/null guards for timestamp normalization; replaces non-null assertion on remoteJid with an explicit guard
packages/bot/core/tsconfig.json	Corrects extends path from ../../tsconfig.base.json to ../../../tsconfig.base.json to match actual repo depth; adds trailing newline
packages/bot/discord/tsconfig.json	Same tsconfig path correction as core; adds trailing newline
packages/bot/signal/tsconfig.json	Same tsconfig path correction as core; adds trailing newline
packages/bot/telegram/tsconfig.json	Same tsconfig path correction as core; adds trailing newline
packages/bot/whatsapp/tsconfig.json	Same tsconfig path correction as core; adds trailing newline

_{Reviews (2): Last reviewed commit: "fix(bot): guard invalid WhatsApp timesta..." | Re-trigger Greptile}