feat: AIUI chat mode integration with iframe, context broker, overnight loop

- Chat mode: AIUI loads in sandboxed iframe at /dashboard/chat with transparent bg
- Mode switcher: Easy + Pro tabs only, Chat is a launcher button
- Keyboard shortcuts: Cmd+1 (Easy), Cmd+2 (Pro), Cmd+3 (Chat), Cmd+M (cycle)
- Directional transitions: chat slides from/to left, dashboard from/to right
- Context broker: postMessage protocol for quarantined AIUI communication
- AI permissions store: user-controlled toggles for data access categories
- Settings UI: AI Data Access section with per-category toggles
- AIUI container manifest and nginx proxy config for /aiui/
- Deploy script builds AIUI with /aiui/ base path
- Overnight loop infrastructure (loop.sh, prepare.sh, plan.md, prompt.md)
- Security hooks for autonomous overnight runs

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

.claude/hooks/protect-files.sh

@@ -0,0 +1,82 @@
+#!/usr/bin/env bash
+# PreToolUse Edit|Write guard: block edits outside project and to protected paths.
+# Denies: paths outside project, .git/, .env*, lockfiles, node_modules/, deploy-config.sh
+set -euo pipefail
+
+INPUT=$(cat)
+FILE_PATH=$(python3 -c "
+import json, sys
+try:
+    data = json.loads(sys.stdin.read())
+    print(data.get('tool_input', {}).get('file_path', ''))
+except: pass
+" <<< "$INPUT")
+BASE="${CLAUDE_PROJECT_DIR:-}"
+[[ -z "$BASE" ]] && BASE=$(python3 -c "
+import json, sys
+try:
+    data = json.loads(sys.stdin.read())
+    print(data.get('cwd', ''))
+except: pass
+" <<< "$INPUT")
+[[ -z "$BASE" ]] && BASE="$(pwd)"
+
+# Resolve to absolute path
+if [[ -z "$FILE_PATH" ]]; then
+  exit 0
+fi
+ABS_BASE=$(cd "$BASE" 2>/dev/null && pwd) || true
+[[ -z "$ABS_BASE" ]] && ABS_BASE=$(python3 -c "import os,sys; print(os.path.abspath(os.path.normpath(sys.argv[1])))" "$BASE" 2>/dev/null) || true
+[[ -z "$ABS_BASE" ]] && ABS_BASE="$BASE"
+[[ "$ABS_BASE" != */ ]] && ABS_BASE="${ABS_BASE}/"
+if [[ "$FILE_PATH" != /* ]]; then
+  ABS_PATH="$ABS_BASE${FILE_PATH#./}"
+else
+  ABS_PATH="$FILE_PATH"
+fi
+ABS_PATH=$(python3 -c "import os,sys; print(os.path.abspath(os.path.normpath(sys.argv[1])))" "$ABS_PATH" 2>/dev/null) || true
+[[ -z "$ABS_PATH" ]] && ABS_PATH="$ABS_BASE${FILE_PATH#./}"
+
+deny() {
+  local reason="$1"
+  echo "Blocked: $ABS_PATH — $reason" >&2
+  python3 -c "
+import json
+print(json.dumps({
+    'hookSpecificOutput': {
+        'hookEventName': 'PreToolUse',
+        'permissionDecision': 'deny',
+        'permissionDecisionReason': '$reason'
+    }
+}))
+"
+  exit 0
+}
+
+# Protected patterns
+PROTECTED_PATTERNS=(
+  ".git/"
+  ".env"
+  ".env.local"
+  "node_modules/"
+  "package-lock.json"
+  "scripts/deploy-config.sh"
+)
+
+for pattern in "${PROTECTED_PATTERNS[@]}"; do
+  if [[ "$ABS_PATH" == *"$pattern"* ]] || [[ "$ABS_PATH" == *"/$pattern" ]]; then
+    deny "Edit blocked: path matches protected pattern ($pattern)"
+  fi
+done
+
+# .env.*.local
+if [[ "$ABS_PATH" =~ \.env\..*\.local$ ]]; then
+  deny "Edit blocked: .env.*.local files contain secrets"
+fi
+
+# Ensure path is under project root
+if [[ "$ABS_PATH" != "$ABS_BASE"* ]] && [[ "$ABS_PATH" != "$BASE"* ]]; then
+  deny "Edit blocked: path is outside project directory"
+fi
+
+exit 0