perf: improve cleanup UI responsiveness and reduce visual flicker

- Speed up spinner animation from 100ms to 50ms for smoother visuals
- Fix spinner flicker by deferring stop until output is ready
- Remove unnecessary 'Preparing...' spinner at section start
- Hide whitelist-protected items from output (Trash, Finder metadata)
- Add spinner feedback for system diagnostic log cleanup
- Remove redundant stop_section_spinner calls in cleanup modules

The cleanup process now feels significantly faster and more polished,
with continuous visual feedback and no jarring gaps between operations.

bin/clean.sh

@@ -164,10 +164,6 @@ start_section() {
     echo ""
     echo -e "${PURPLE_BOLD}${ICON_ARROW} $1${NC}"
 
-    if [[ -t 1 ]]; then
-        MOLE_SPINNER_PREFIX="  " start_inline_spinner "Preparing..."
-    fi
-
     if [[ "$DRY_RUN" == "true" ]]; then
         ensure_user_file "$EXPORT_LIST_FILE"
         echo "" >>"$EXPORT_LIST_FILE"
@@ -308,9 +304,6 @@ safe_clean() {
         return 0
     fi
 
-    # Always stop spinner before outputting results
-    stop_section_spinner
-
     local description
     local -a targets
 
@@ -361,6 +354,7 @@ safe_clean() {
     local show_scan_feedback=false
     if [[ ${#targets[@]} -gt 20 && -t 1 ]]; then
         show_scan_feedback=true
+        stop_section_spinner
         MOLE_SPINNER_PREFIX="  " start_inline_spinner "Scanning ${#targets[@]} items..."
     fi
 
@@ -614,6 +608,9 @@ safe_clean() {
     fi
 
     if [[ $removed_any -eq 1 ]]; then
+        # Stop spinner before output
+        stop_section_spinner
+
         local size_human=$(bytes_to_human "$((total_size_kb * 1024))")
 
         local label="$description"

lib/clean/system.sh

@@ -79,20 +79,24 @@ clean_deep_system() {
     done < <(run_with_timeout 5 command find /private/var/folders -type d -name "*.code_sign_clone" -path "*/X/*" -print0 2>/dev/null || true)
     stop_section_spinner
     [[ $code_sign_cleaned -gt 0 ]] && log_success "Browser code signature caches ($code_sign_cleaned items)"
-    safe_sudo_find_delete "/private/var/db/diagnostics/Special" "*" "$MOLE_LOG_AGE_DAYS" "f" || true
-    safe_sudo_find_delete "/private/var/db/diagnostics/Persist" "*" "$MOLE_LOG_AGE_DAYS" "f" || true
-    safe_sudo_find_delete "/private/var/db/DiagnosticPipeline" "*" "$MOLE_LOG_AGE_DAYS" "f" || true
-    log_success "System diagnostic logs"
-    safe_sudo_find_delete "/private/var/db/powerlog" "*" "$MOLE_LOG_AGE_DAYS" "f" || true
-    log_success "Power logs"
-    safe_sudo_find_delete "/private/var/db/reportmemoryexception/MemoryLimitViolations" "*" "30" "f" || true
-    log_success "Memory exception reports"
-    start_section_spinner "Cleaning diagnostic trace logs..."
-    local diag_logs_cleaned=0
-    safe_sudo_find_delete "/private/var/db/diagnostics/Persist" "*.tracev3" "30" "f" && diag_logs_cleaned=1 || true
-    safe_sudo_find_delete "/private/var/db/diagnostics/Special" "*.tracev3" "30" "f" && diag_logs_cleaned=1 || true
+
+    start_section_spinner "Cleaning system diagnostic logs..."
+    local diag_cleaned=0
+    safe_sudo_find_delete "/private/var/db/diagnostics/Special" "*" "$MOLE_LOG_AGE_DAYS" "f" && diag_cleaned=1 || true
+    safe_sudo_find_delete "/private/var/db/diagnostics/Persist" "*" "$MOLE_LOG_AGE_DAYS" "f" && diag_cleaned=1 || true
+    safe_sudo_find_delete "/private/var/db/DiagnosticPipeline" "*" "$MOLE_LOG_AGE_DAYS" "f" && diag_cleaned=1 || true
+    safe_sudo_find_delete "/private/var/db/powerlog" "*" "$MOLE_LOG_AGE_DAYS" "f" && diag_cleaned=1 || true
+    safe_sudo_find_delete "/private/var/db/reportmemoryexception/MemoryLimitViolations" "*" "30" "f" && diag_cleaned=1 || true
     stop_section_spinner
-    [[ $diag_logs_cleaned -eq 1 ]] && log_success "System diagnostic trace logs"
+
+    [[ $diag_cleaned -eq 1 ]] && log_success "System diagnostic logs"
+
+    start_section_spinner "Cleaning diagnostic trace logs..."
+    local trace_cleaned=0
+    safe_sudo_find_delete "/private/var/db/diagnostics/Persist" "*.tracev3" "30" "f" && trace_cleaned=1 || true
+    safe_sudo_find_delete "/private/var/db/diagnostics/Special" "*.tracev3" "30" "f" && trace_cleaned=1 || true
+    stop_section_spinner
+    [[ $trace_cleaned -eq 1 ]] && log_success "System diagnostic trace logs"
 }
 # Incomplete Time Machine backups.
 clean_time_machine_failed_backups() {

lib/clean/user.sh

@@ -7,10 +7,7 @@ clean_user_essentials() {
     stop_section_spinner
 
     safe_clean ~/Library/Logs/* "User app logs"
-    if is_path_whitelisted "$HOME/.Trash"; then
-        note_activity
-        echo -e "  ${GREEN}${ICON_EMPTY}${NC} Trash · whitelist protected"
-    else
+    if ! is_path_whitelisted "$HOME/.Trash"; then
         safe_clean ~/.Trash/* "Trash"
     fi
 }
@@ -288,17 +285,13 @@ scan_external_volumes() {
 }
 # Finder metadata (.DS_Store).
 clean_finder_metadata() {
-    stop_section_spinner
     if [[ "$PROTECT_FINDER_METADATA" == "true" ]]; then
-        note_activity
-        echo -e "  ${GREEN}${ICON_EMPTY}${NC} Finder metadata · whitelist protected"
         return
     fi
     clean_ds_store_tree "$HOME" "Home directory (.DS_Store)"
 }
 # macOS system caches and user-level leftovers.
 clean_macos_system_caches() {
-    stop_section_spinner
     # safe_clean already checks protected paths.
     safe_clean ~/Library/Saved\ Application\ State/* "Saved application states" || true
     safe_clean ~/Library/Caches/com.apple.photoanalysisd "Photo analysis cache" || true
@@ -318,7 +311,6 @@ clean_macos_system_caches() {
     safe_clean ~/Library/Application\ Support/AddressBook/Sources/*/Photos.cache "Address Book photo cache" || true
 }
 clean_recent_items() {
-    stop_section_spinner
     local shared_dir="$HOME/Library/Application Support/com.apple.sharedfilelist"
     local -a recent_lists=(
         "$shared_dir/com.apple.LSSharedFileList.RecentApplications.sfl2"
@@ -338,7 +330,6 @@ clean_recent_items() {
     safe_clean ~/Library/Preferences/com.apple.recentitems.plist "Recent items preferences" || true
 }
 clean_mail_downloads() {
-    stop_section_spinner
     local mail_age_days=${MOLE_MAIL_AGE_DAYS:-}
     if ! [[ "$mail_age_days" =~ ^[0-9]+$ ]]; then
         mail_age_days=30
@@ -449,7 +440,6 @@ process_container_cache() {
 }
 # Browser caches (Safari/Chrome/Edge/Firefox).
 clean_browsers() {
-    stop_section_spinner
     safe_clean ~/Library/Caches/com.apple.Safari/* "Safari cache"
     # Chrome/Chromium.
     safe_clean ~/Library/Caches/Google/Chrome/* "Chrome cache"
@@ -485,7 +475,6 @@ clean_browsers() {
 }
 # Cloud storage caches.
 clean_cloud_storage() {
-    stop_section_spinner
     safe_clean ~/Library/Caches/com.dropbox.* "Dropbox cache"
     safe_clean ~/Library/Caches/com.getdropbox.dropbox "Dropbox cache"
     safe_clean ~/Library/Caches/com.google.GoogleDrive "Google Drive cache"
@@ -496,7 +485,6 @@ clean_cloud_storage() {
 }
 # Office app caches.
 clean_office_applications() {
-    stop_section_spinner
     safe_clean ~/Library/Caches/com.microsoft.Word "Microsoft Word cache"
     safe_clean ~/Library/Caches/com.microsoft.Excel "Microsoft Excel cache"
     safe_clean ~/Library/Caches/com.microsoft.Powerpoint "Microsoft PowerPoint cache"
@@ -516,7 +504,6 @@ clean_virtualization_tools() {
 }
 # Application Support logs/caches.
 clean_application_support_logs() {
-    stop_section_spinner
     if [[ ! -d "$HOME/Library/Application Support" ]] || ! ls "$HOME/Library/Application Support" >/dev/null 2>&1; then
         note_activity
         echo -e "  ${YELLOW}${ICON_WARNING}${NC} Skipped: No permission to access Application Support"

lib/core/ui.sh

@@ -308,7 +308,7 @@ start_inline_spinner() {
                 # Output to stderr to avoid interfering with stdout
                 printf "\r${MOLE_SPINNER_PREFIX:-}${BLUE}%s${NC} %s" "$c" "$message" >&2 || break
                 ((i++))
-                sleep 0.1
+                sleep 0.05
             done
 
             # Clean up stop file before exiting