move pi-mono into companion-cloud as apps/companion-os

- Copy all pi-mono source into apps/companion-os/
- Update Dockerfile to COPY pre-built binary instead of downloading from GitHub Releases
- Update deploy-staging.yml to build pi from source (bun compile) before Docker build
- Add apps/companion-os/** to path triggers
- No more cross-repo dispatch needed

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

.husky/pre-commit

@@ -0,0 +1,68 @@
+#!/bin/sh
+
+# Get list of staged files before running checks
+STAGED_FILES=$(git diff --cached --name-only)
+
+if [ -z "$STAGED_FILES" ]; then
+  echo "No staged files to check."
+  exit 0
+fi
+
+echo "Running checks on staged files..."
+
+run_checks() {
+  # shellcheck disable=SC2086 # intentionally preserving word splitting for file list
+  CHECK_OUTPUT=""
+  CHECK_STATUS=0
+  set +e
+  CHECK_OUTPUT="$(npx -y @biomejs/biome check --write --error-on-warnings "$1" 2>&1)"
+  CHECK_STATUS=$?
+  set -e
+
+  if [ "$CHECK_STATUS" -ne 0 ]; then
+    if printf '%s\n' "$CHECK_OUTPUT" | grep -Fq "No files were processed in the specified paths."; then
+      return 0
+    fi
+    echo "$CHECK_OUTPUT"
+    return "$CHECK_STATUS"
+  fi
+
+  [ -n "$CHECK_OUTPUT" ] && echo "$CHECK_OUTPUT"
+}
+
+# Run Biome only when staged files include style targets
+if echo "$STAGED_FILES" | grep -Eq '\.(ts|tsx|js|jsx|json)$'; then
+  echo "Running biome on staged files..."
+  TS_OR_JS_FILES=$(echo "$STAGED_FILES" | grep -E '\.(ts|tsx|js|jsx|json)$' | tr '\n' ' ')
+  if [ -n "$TS_OR_JS_FILES" ]; then
+    run_checks "$TS_OR_JS_FILES"
+  fi
+fi
+
+RUN_BROWSER_SMOKE=0
+for file in $STAGED_FILES; do
+  case "$file" in
+    packages/ai/*|packages/web-ui/*|package.json|package-lock.json)
+      RUN_BROWSER_SMOKE=1
+      break
+      ;;
+  esac
+done
+
+if [ $RUN_BROWSER_SMOKE -eq 1 ]; then
+  echo "Running browser smoke check..."
+  npm run check:browser-smoke
+  if [ $? -ne 0 ]; then
+    echo "❌ Browser smoke check failed."
+    exit 1
+  fi
+fi
+
+# Restage files that were previously staged and may have been modified by formatting
+for file in $STAGED_FILES; do
+  if [ -f "$file" ]; then
+    git add "$file"
+  fi
+done
+
+echo "✅ All pre-commit checks passed!"