Add Discord-native hybrid front-end for Jarvis (bot + bridge)

Transform isair/jarvis into a Discord-controlled voice assistant running on
the Ubuntu VNC desktop, keeping the mature ~39k-line Python brain intact.

- bot/ (Node + bun, discord.js): /자비스 slash commands (ephemeral),
  voice channel join + voice receive/playback, pluggable VNC screen broadcast
  (selfbot live / noVNC / screenshot)
- bridge/ (Python, Flask): wraps jarvis STT + run_reply_engine + Piper TTS
  behind a thin localhost HTTP API
- .env.example, scripts/ (start_bridge/start_bot/dev), README rewrite,
  docs/language-comparison.md and docs/vnc-xfce-setup.md

Language decision: hybrid (Python brain + Node/bun Discord layer) because
Discord blocks bot video; native screen broadcast only works via a Node
selfbot library.

.githooks/pre-push

@@ -0,0 +1,32 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+if [ "${SKIP_TESTS:-}" = "1" ]; then
+  echo "[pre-push] SKIP_TESTS=1 -> skipping unit tests"
+  exit 0
+fi
+
+echo "[pre-push] Running all tests (unit, integration, and e2e)"
+
+# Prefer python -m pytest to avoid PATH issues
+if ! command -v python >/dev/null 2>&1; then
+  echo "[pre-push] python not found on PATH; skipping tests"
+  exit 0
+fi
+
+if ! python -c "import pytest" >/dev/null 2>&1; then
+  echo "[pre-push] pytest not installed; skipping tests"
+  exit 0
+fi
+
+# Run all tests for comprehensive validation before push
+if ! python -m pytest -q; then
+  echo "[pre-push] Tests failed. Aborting push."
+  exit 1
+fi
+
+echo "[pre-push] All tests passed"
+exit 0
+
+