security: harden BOM processing and LaunchAgents detection

- Add path traversal protection in BOM receipt parsing
- Remove invalid ~/Library/LaunchDaemons path references
- Strengthen LaunchAgents matching (min 5 chars, exclude com.apple.*)
- Add 300s timeout to brew cask uninstall to prevent hangs
Addresses security review findings from V1.21.0 audit.

lib/core/app_protection.sh

@@ -643,6 +643,14 @@ is_path_whitelisted() {
 find_app_files() {
     local bundle_id="$1"
     local app_name="$2"
+
+    # Early validation: require at least one valid identifier
+    # Skip scanning if both bundle_id and app_name are invalid
+    if [[ -z "$bundle_id" || "$bundle_id" == "unknown" ]] &&
+        [[ -z "$app_name" || ${#app_name} -lt 2 ]]; then
+        return 0 # Silent return to avoid invalid scanning
+    fi
+
     local -a files_to_clean=()
 
     # Normalize app name for matching
@@ -665,7 +673,6 @@ find_app_files() {
         "$HOME/Library/HTTPStorages/$bundle_id"
         "$HOME/Library/Cookies/$bundle_id.binarycookies"
         "$HOME/Library/LaunchAgents/$bundle_id.plist"
-        "$HOME/Library/LaunchDaemons/$bundle_id.plist"
         "$HOME/Library/Application Scripts/$bundle_id"
         "$HOME/Library/Services/$app_name.workflow"
         "$HOME/Library/QuickLook/$app_name.qlgenerator"
@@ -740,18 +747,16 @@ find_app_files() {
         fi
     fi
 
-    # Launch Agents and Daemons by name (special handling)
-    if [[ ${#app_name} -gt 3 ]]; then
-        if [[ -d ~/Library/LaunchAgents ]]; then
+    # Launch Agents by name (special handling)
+    # Note: LaunchDaemons are system-level and handled in find_app_system_files()
+    if [[ ${#app_name} -ge 5 ]] && [[ -d ~/Library/LaunchAgents ]]; then
         while IFS= read -r -d '' plist; do
-                files_to_clean+=("$plist")
-            done < <(command find ~/Library/LaunchAgents -maxdepth 1 \( -name "*$app_name*.plist" \) -print0 2> /dev/null)
+            local plist_name=$(basename "$plist")
+            if [[ "$plist_name" =~ ^com\.apple\. ]]; then
+                continue
             fi
-        if [[ -d ~/Library/LaunchDaemons ]]; then
-            while IFS= read -r -d '' plist; do
             files_to_clean+=("$plist")
-            done < <(command find ~/Library/LaunchDaemons -maxdepth 1 \( -name "*$app_name*.plist" \) -print0 2> /dev/null)
-        fi
+        done < <(command find ~/Library/LaunchAgents -maxdepth 1 -name "*$app_name*.plist" -print0 2>/dev/null)
     fi
 
     # Handle specialized toolchains and development environments
@@ -764,7 +769,7 @@ find_app_files() {
 
     # 2. Android Studio (Google)
     if [[ "$app_name" =~ Android.*Studio|android.*studio ]] || [[ "$bundle_id" =~ google.*android.*studio|jetbrains.*android ]]; then
-        for d in ~/AndroidStudioProjects ~/Library/Android ~/.android ~/.gradle; do
+        for d in ~/AndroidStudioProjects ~/Library/Android ~/.android; do
             [[ -d "$d" ]] && files_to_clean+=("$d")
         done
         [[ -d ~/Library/Application\ Support/Google ]] && while IFS= read -r -d '' d; do files_to_clean+=("$d"); done < <(command find ~/Library/Application\ Support/Google -maxdepth 1 -name "AndroidStudio*" -print0 2>/dev/null)
@@ -904,6 +909,13 @@ find_app_receipt_files() {
     # Skip if no bundle ID
     [[ -z "$bundle_id" || "$bundle_id" == "unknown" ]] && return 0
 
+    # Validate bundle_id format to prevent wildcard injection
+    # Only allow alphanumeric characters, dots, hyphens, and underscores
+    if [[ ! "$bundle_id" =~ ^[a-zA-Z0-9._-]+$ ]]; then
+        debug_log "Invalid bundle_id format: $bundle_id"
+        return 0
+    fi
+
     local -a receipt_files=()
     local -a bom_files=()
 
@@ -935,6 +947,15 @@ find_app_receipt_files() {
                     clean_path="/$clean_path"
                 fi
 
+                # Path traversal protection: reject paths containing ..
+                if [[ "$clean_path" =~ \.\. ]]; then
+                    debug_log "Rejected path traversal in BOM: $clean_path"
+                    continue
+                fi
+
+                # Normalize path (remove duplicate slashes)
+                clean_path=$(echo "$clean_path" | sed 's#//*#/#g')
+
                 # ------------------------------------------------------------------------
                 # Safety check: restrict removal to trusted paths
                 # ------------------------------------------------------------------------

lib/uninstall/brew.sh

@@ -173,25 +173,22 @@ brew_uninstall_cask() {
 
     debug_log "Attempting brew uninstall --cask $cask_name"
 
-    # Run uninstall with timeout (suppress hints/auto-update)
-    debug_log "Attempting brew uninstall --cask $cask_name"
-
     # Ensure we have sudo access if needed, to prevent brew from hanging on password prompt
-    # Many brew casks need sudo to uninstall
     if ! sudo -n true 2>/dev/null; then
-        # If we don't have sudo, try to get it (visibly)
         sudo -v
     fi
 
     local uninstall_ok=false
+    local brew_exit=0
 
-    # Run directly without output capture to allow user interaction/visibility
-    # This avoids silence/hangs when brew asks for passwords or confirmation
-    if HOMEBREW_NO_ENV_HINTS=1 HOMEBREW_NO_AUTO_UPDATE=1 NONINTERACTIVE=1 \
-        brew uninstall --cask "$cask_name"; then
+    # Run with timeout to prevent hangs from problematic cask scripts
+    if run_with_timeout 300 \
+        env HOMEBREW_NO_ENV_HINTS=1 HOMEBREW_NO_AUTO_UPDATE=1 NONINTERACTIVE=1 \
+        brew uninstall --cask "$cask_name" 2>&1; then
         uninstall_ok=true
     else
-        debug_log "brew uninstall failed with exit code $?"
+        brew_exit=$?
+        debug_log "brew uninstall timeout or failed with exit code: $brew_exit"
     fi
 
     # Verify removal