fix: remove eager import from __init__.py and add sync.sh

The `from . import bird_x` in __init__.py caused ImportError for all
other module imports (youtube_yt, render, etc.) when bird_x had issues,
crashing the entire script in Codex. Making it a bare package marker
lets Python resolve `from lib import X` normally.

Added scripts/sync.sh to deploy to all three skill locations
(~/.claude, ~/.agents, ~/.codex) with import verification.

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

scripts/sync.sh

@@ -0,0 +1,53 @@
+#!/usr/bin/env bash
+# sync.sh - Deploy last30days skill to all host locations
+# Usage: bash scripts/sync.sh  (run from repo root)
+set -euo pipefail
+
+SRC="$(cd "$(dirname "$0")/.." && pwd)"
+echo "Source: $SRC"
+
+TARGETS=(
+  "$HOME/.claude/skills/last30days"
+  "$HOME/.agents/skills/last30days"
+  "$HOME/.codex/skills/last30days"
+)
+
+for t in "${TARGETS[@]}"; do
+  echo ""
+  echo "--- Syncing to $t ---"
+  mkdir -p "$t/scripts/lib"
+
+  # SKILL.md
+  cp "$SRC/SKILL.md" "$t/"
+
+  # Main script
+  cp "$SRC/scripts/last30days.py" "$t/scripts/"
+
+  # All lib modules
+  cp "$SRC/scripts/lib/"*.py "$t/scripts/lib/"
+
+  # Vendor directory (bird-search CLI)
+  if [ -d "$SRC/scripts/lib/vendor" ]; then
+    cp -r "$SRC/scripts/lib/vendor" "$t/scripts/lib/"
+  fi
+
+  # Fixtures
+  if [ -d "$SRC/fixtures" ]; then
+    mkdir -p "$t/fixtures"
+    cp -r "$SRC/fixtures/"* "$t/fixtures/" 2>/dev/null || true
+  fi
+
+  # Count and report
+  mod_count=$(ls "$t/scripts/lib/"*.py 2>/dev/null | wc -l | tr -d ' ')
+  echo "  Copied $mod_count modules"
+
+  # Verify imports
+  if (cd "$t/scripts" && python3 -c "from lib import youtube_yt, bird_x, render, ui; print('  Import check: OK')" 2>&1); then
+    true
+  else
+    echo "  Import check FAILED"
+  fi
+done
+
+echo ""
+echo "Sync complete."