feat: add rainbow wave animation to progress bar

install.sh

@@ -394,8 +394,9 @@ apply_patches() {
   chmod +x "${patch_script}"
 
   local patch_args=("${statusline_file}" "${working_dir}/messages/${language}.json")
-  [[ "${components}" != *"messages"* ]] && patch_args+=("--no-messages")
-  [[ "${components}" != *"cost"* ]]     && patch_args+=("--no-cost")
+  [[ "${components}" != *"messages"* ]]      && patch_args+=("--no-messages")
+  [[ "${components}" != *"cost"* ]]          && patch_args+=("--no-cost")
+  [[ "${components}" != *"rainbow-wave"* ]]  && patch_args+=("--no-rainbow-wave")
 
   "${patch_script}" "${patch_args[@]}" || {
     error "Patching failed"
@@ -449,28 +450,34 @@ prompt_component_selection() {
   piped_status=$?
   set -e
   if [[ ${piped_status} -eq 0 ]]; then
-    echo "messages cost"
+    echo "messages cost rainbow-wave"
     return
   fi
 
   echo "" >&2
   echo -e "${CYAN}Select features:${NC}" >&2
   echo "" >&2
-  echo "  1) All features (messages + cost)" >&2
-  echo "  2) Messages only" >&2
-  echo "  3) Cost only" >&2
-  echo "  4) Minimal (no messages, no cost)" >&2
+  echo "  1) All features (messages + cost + rainbow-wave)" >&2
+  echo "  2) Messages + Cost" >&2
+  echo "  3) Messages + Rainbow Wave" >&2
+  echo "  4) Messages only" >&2
+  echo "  5) Cost only" >&2
+  echo "  6) Rainbow Wave only" >&2
+  echo "  7) Minimal (no messages, no cost, no rainbow-wave)" >&2
   echo "" >&2
   printf "Enter selection [1]: " >&2
   read -r selection < /dev/tty || selection=""
   selection="${selection:-1}"
 
   case "${selection}" in
-    1) echo "messages cost" ;;
-    2) echo "messages" ;;
-    3) echo "cost" ;;
-    4) echo "" ;;
-    *) echo "messages cost" ;;
+    1) echo "messages cost rainbow-wave" ;;
+    2) echo "messages cost" ;;
+    3) echo "messages rainbow-wave" ;;
+    4) echo "messages" ;;
+    5) echo "cost" ;;
+    6) echo "rainbow-wave" ;;
+    7) echo "" ;;
+    *) echo "messages cost rainbow-wave" ;;
   esac
 }
 
@@ -572,7 +579,7 @@ NODEEOF
 
 main() {
   local selected_language="en"
-  local selected_components="messages cost"
+  local selected_components="messages cost rainbow-wave"
   local total_steps=5
   local current_step=0
   local status=0

patch-statusline.sh

@@ -23,18 +23,20 @@ set -euo pipefail  # Exit on error, undefined vars, pipe failures
 # ============================================================
 
 show_usage() {
-  echo "Usage: $0 <statusline-file> [language-json] [--no-messages] [--no-cost]"
+  echo "Usage: $0 <statusline-file> [language-json] [--no-messages] [--no-cost] [--no-rainbow-wave]"
   echo ""
   echo "Arguments:"
-  echo "  statusline-file   Path to statusline.sh file (required)"
-  echo "  language-json     Path to JSON messages file (optional)"
-  echo "  --no-messages     Disable context messages"
-  echo "  --no-cost         Disable cost tracking"
+  echo "  statusline-file     Path to statusline.sh file (required)"
+  echo "  language-json       Path to JSON messages file (optional)"
+  echo "  --no-messages       Disable context messages"
+  echo "  --no-cost           Disable cost tracking"
+  echo "  --no-rainbow-wave   Disable rainbow wave progress bar"
   echo ""
   echo "Examples:"
   echo "  $0 statusline.sh messages/pt.json"
   echo "  $0 statusline.sh --no-messages"
   echo "  $0 statusline.sh messages/es.json --no-cost"
+  echo "  $0 statusline.sh --no-rainbow-wave"
 }
 
 fail() {
@@ -68,9 +70,11 @@ replace_config_block() {
   local file="$1"
   local show_messages="$2"
   local show_cost="$3"
+  local show_rainbow_wave="$4"
   local content
   content="readonly SHOW_MESSAGES=${show_messages}
-readonly SHOW_COST=${show_cost}"
+readonly SHOW_COST=${show_cost}
+readonly SHOW_RAINBOW_WAVE=${show_rainbow_wave}"
   _replace_marker_block "${file}" '@CONFIG_START' '@CONFIG_END' "${content}"
 }
 
@@ -129,6 +133,7 @@ main() {
   local language_json=""
   local show_messages=true
   local show_cost=true
+  local show_rainbow_wave=true
 
   # Parse remaining args
   shift
@@ -140,6 +145,9 @@ main() {
       --no-cost)
         show_cost=false
         ;;
+      --no-rainbow-wave)
+        show_rainbow_wave=false
+        ;;
       *.json)
         language_json="${arg}"
         ;;
@@ -180,8 +188,8 @@ main() {
   echo "Patching ${statusline_file}..."
 
   # 1. Replace CONFIG block
-  replace_config_block "${statusline_file}" "${show_messages}" "${show_cost}"
-  echo "  ✓ Updated configuration (SHOW_MESSAGES=${show_messages}, SHOW_COST=${show_cost})"
+  replace_config_block "${statusline_file}" "${show_messages}" "${show_cost}" "${show_rainbow_wave}"
+  echo "  ✓ Updated configuration (SHOW_MESSAGES=${show_messages}, SHOW_COST=${show_cost}, SHOW_RAINBOW_WAVE=${show_rainbow_wave})"
 
   # 2. Replace MESSAGES block (if language JSON provided)
   if [[ -n "${language_json}" ]]; then

statusline.sh

@@ -35,12 +35,17 @@ readonly STATE_DIRTY="dirty"
 readonly BAR_FILLED="█"
 readonly BAR_EMPTY="░"
 
+# Wave animation colors (256-color palette rainbow)
+readonly WAVE_COLORS=(196 208 220 226 118 46 48 51 33 21 93 201)
+readonly NUM_WAVE_COLORS=12
+
 # ============================================================
 # RUNTIME CONFIGURATION (Patched by patch-statusline.sh)
 # ============================================================
 # @CONFIG_START
 readonly SHOW_MESSAGES=true
 readonly SHOW_COST=true
+readonly SHOW_RAINBOW_WAVE=true
 # @CONFIG_END
 
 # ============================================================
@@ -305,31 +310,42 @@ build_progress_bar() {
   local filled=$((percent * BAR_WIDTH / 100))
   local empty=$((BAR_WIDTH - filled))
 
-  # Determine bar color based on tier
-  local tier bar_color
-  tier=$(get_context_tier "${percent}")
+  local filled_bar="" i
 
-  case "${tier}" in
-    0) bar_color="${GREEN}" ;;    # Very low
-    1) bar_color="${CYAN}" ;;     # Low
-    2) bar_color="${ORANGE}" ;;   # Medium
-    3) bar_color="${ORANGE}" ;;   # High
-    4) bar_color="${RED}" ;;      # Critical
-    *) bar_color="${GRAY}" ;;     # Fallback
-  esac
+  if [[ "${SHOW_RAINBOW_WAVE}" == "true" ]]; then
+    # Build filled portion with rainbow wave animation
+    local color_idx
+    local time_phase=$(( ${_wave_time:-0} % NUM_WAVE_COLORS ))
+    for ((i=0; i<filled; i++)); do
+      color_idx=$(( (i + time_phase) % NUM_WAVE_COLORS ))
+      filled_bar+="\033[38;5;${WAVE_COLORS[${color_idx}]}m${BAR_FILLED}"
+    done
+  else
+    # Build filled portion with tier-based color
+    local tier bar_color
+    tier=$(get_context_tier "${percent}")
+    case "${tier}" in
+      0) bar_color="${GREEN}" ;;
+      1) bar_color="${CYAN}" ;;
+      2) bar_color="${ORANGE}" ;;
+      3) bar_color="${ORANGE}" ;;
+      4) bar_color="${RED}" ;;
+      *) bar_color="${GRAY}" ;;
+    esac
+    for ((i=0; i<filled; i++)); do
+      filled_bar+="${BAR_FILLED}"
+    done
+    filled_bar="${bar_color}${filled_bar}"
+  fi
 
-  # Build filled and empty portions (pure bash - UTF-8 safe)
-  local filled_bar="" empty_bar=""
-  local i
-  for ((i=0; i<filled; i++)); do
-    filled_bar+="${BAR_FILLED}"
-  done
+  # Build empty portion (stays gray)
+  local empty_bar=""
   for ((i=0; i<empty; i++)); do
     empty_bar+="${BAR_EMPTY}"
   done
 
-  # Output with colors
-  echo -n "${bar_color}${filled_bar}${NC}${GRAY}${empty_bar}${NC}"
+  # Output: colored filled blocks + reset + gray empty blocks + reset
+  echo -n "${filled_bar}${NC}${GRAY}${empty_bar}${NC}"
 }
 
 # Get random context message based on usage percentage
@@ -415,7 +431,9 @@ get_git_info() {
   local git_opts=()
 
   # Validate and set git directory option
-  if is_present "${current_dir}"; then
+  local is_dir_present_rc=0
+  is_present "${current_dir}" || is_dir_present_rc=$?
+  if [[ "${is_dir_present_rc}" -eq 0 ]]; then
     # Invoke validation separately to avoid masking return value
     local validation_result=0
     validate_directory "${current_dir}"
@@ -532,7 +550,14 @@ build_directory_component() {
   local current_dir="$1"
   local dir_name
 
-  if is_present "${current_dir}" && validate_directory "${current_dir}"; then
+  local present_rc=0 valid_rc=0
+  is_present "${current_dir}" || present_rc=$?
+  if [[ "${present_rc}" -eq 0 ]]; then
+    validate_directory "${current_dir}" || valid_rc=$?
+  else
+    valid_rc=1
+  fi
+  if [[ "${valid_rc}" -eq 0 ]]; then
     dir_name=$(get_dirname "${current_dir}")
   else
     dir_name=$(get_dirname "${PWD}")
@@ -574,7 +599,9 @@ build_files_component() {
   local file_count="$1"
 
   # Only show if there are modified files
-  if is_present "${file_count}" && [[ "${file_count}" != "0" ]]; then
+  local has_files_rc=0
+  is_present "${file_count}" || has_files_rc=$?
+  if [[ "${has_files_rc}" -eq 0 ]] && [[ "${file_count}" != "0" ]]; then
     echo "${CHANGE_ICON} ${ORANGE}changes${NC}"
   fi
 }
@@ -586,7 +613,9 @@ build_cost_component() {
   [[ "${SHOW_COST}" != "true" ]] && return
 
   # Validate cost is numeric before printf (prevents format string injection)
-  if is_present "${cost_usd}" && [[ "${cost_usd}" != "0" ]]; then
+  local has_cost_rc=0
+  is_present "${cost_usd}" || has_cost_rc=$?
+  if [[ "${has_cost_rc}" -eq 0 ]] && [[ "${cost_usd}" != "0" ]]; then
     # Check if value is a valid number (integer or decimal)
     if [[ "${cost_usd}" =~ ^[0-9]+(\.[0-9]+)?$ ]]; then
       # Use LC_NUMERIC=C to ensure decimal point (not comma) for printf on Windows
@@ -694,9 +723,18 @@ EOF
 
   # Strip carriage returns (Windows line endings compatibility)
   for _v in model_name current_dir context_size current_usage context_percent cost_usd; do
-    declare "$_v=${!_v%$'\r'}"
+    declare "${_v}=${!_v%$'\r'}"
   done
 
+  # Capture epoch time for wave animation (EPOCHSECONDS is free on bash 5+)
+  if [[ "${SHOW_RAINBOW_WAVE}" == "true" ]]; then
+    if [[ -n "${EPOCHSECONDS:-}" ]]; then
+      _wave_time="${EPOCHSECONDS}"
+    else
+      _wave_time=$(date +%s)
+    fi
+  fi
+
   # Build components (read toggle flags from global constants)
   local model_part context_part dir_part git_part cost_part files_part
   model_part=$(build_model_component "${model_name}")