feat: add 'ccs update' command with smart update notifications

Add comprehensive update functionality with intelligent notification system.
Supports manual update checking, automatic notifications every 24h, and works
across npm and direct installations with proper error handling.

Closes #12

scripts/completion/ccs.bash

@@ -18,7 +18,7 @@ _ccs_completion() {
 
   # Top-level completion (first argument)
   if [[ ${COMP_CWORD} -eq 1 ]]; then
-    local commands="auth doctor sync"
+    local commands="auth doctor sync update"
     local flags="--help --version --shell-completion -h -v -sc"
     local profiles=""
 

scripts/completion/ccs.fish

@@ -73,21 +73,22 @@ complete -c ccs -s v -l version -d 'Show version information'
 complete -c ccs -s sc -l shell-completion -d 'Install shell completion'
 
 # Top-level commands (blue color for commands)
-complete -c ccs -n 'not __fish_seen_subcommand_from auth doctor sync' -a 'auth' -d (set_color blue)'Manage multiple Claude accounts'(set_color normal)
-complete -c ccs -n 'not __fish_seen_subcommand_from auth doctor sync' -a 'doctor' -d (set_color blue)'Run health check and diagnostics'(set_color normal)
-complete -c ccs -n 'not __fish_seen_subcommand_from auth doctor sync' -a 'sync' -d (set_color blue)'Sync delegation commands and skills'(set_color normal)
+complete -c ccs -n 'not __fish_seen_subcommand_from auth doctor sync update' -a 'auth' -d (set_color blue)'Manage multiple Claude accounts'(set_color normal)
+complete -c ccs -n 'not __fish_seen_subcommand_from auth doctor sync update' -a 'doctor' -d (set_color blue)'Run health check and diagnostics'(set_color normal)
+complete -c ccs -n 'not __fish_seen_subcommand_from auth doctor sync update' -a 'sync' -d (set_color blue)'Sync delegation commands and skills'(set_color normal)
+complete -c ccs -n 'not __fish_seen_subcommand_from auth doctor sync update' -a 'update' -d (set_color blue)'Update CCS to latest version'(set_color normal)
 
 # Top-level known settings profiles (green color for model profiles)
-complete -c ccs -n 'not __fish_seen_subcommand_from auth doctor sync' -a 'default' -d (set_color green)'Default Claude Sonnet 4.5'(set_color normal)
-complete -c ccs -n 'not __fish_seen_subcommand_from auth doctor sync' -a 'glm' -d (set_color green)'GLM-4.6 (cost-optimized)'(set_color normal)
-complete -c ccs -n 'not __fish_seen_subcommand_from auth doctor sync' -a 'glmt' -d (set_color green)'GLM-4.6 with thinking mode'(set_color normal)
-complete -c ccs -n 'not __fish_seen_subcommand_from auth doctor sync' -a 'kimi' -d (set_color green)'Kimi for Coding (long-context)'(set_color normal)
+complete -c ccs -n 'not __fish_seen_subcommand_from auth doctor sync update' -a 'default' -d (set_color green)'Default Claude Sonnet 4.5'(set_color normal)
+complete -c ccs -n 'not __fish_seen_subcommand_from auth doctor sync update' -a 'glm' -d (set_color green)'GLM-4.6 (cost-optimized)'(set_color normal)
+complete -c ccs -n 'not __fish_seen_subcommand_from auth doctor sync update' -a 'glmt' -d (set_color green)'GLM-4.6 with thinking mode'(set_color normal)
+complete -c ccs -n 'not __fish_seen_subcommand_from auth doctor sync update' -a 'kimi' -d (set_color green)'Kimi for Coding (long-context)'(set_color normal)
 
 # Top-level custom settings profiles (dynamic, with generic description in green)
-complete -c ccs -n 'not __fish_seen_subcommand_from auth doctor sync' -a '(__fish_ccs_get_custom_settings_profiles)' -d (set_color green)'Settings-based profile'(set_color normal)
+complete -c ccs -n 'not __fish_seen_subcommand_from auth doctor sync update' -a '(__fish_ccs_get_custom_settings_profiles)' -d (set_color green)'Settings-based profile'(set_color normal)
 
 # Top-level account profiles (dynamic, yellow color for account profiles)
-complete -c ccs -n 'not __fish_seen_subcommand_from auth doctor sync' -a '(__fish_ccs_get_account_profiles)' -d (set_color yellow)'Account profile'(set_color normal)
+complete -c ccs -n 'not __fish_seen_subcommand_from auth doctor sync update' -a '(__fish_ccs_get_account_profiles)' -d (set_color yellow)'Account profile'(set_color normal)
 
 # shell-completion subflags
 complete -c ccs -n '__fish_seen_argument -l shell-completion; or __fish_seen_argument -s sc' -l bash -d 'Install for bash'

scripts/completion/ccs.ps1

@@ -12,7 +12,7 @@
 Register-ArgumentCompleter -CommandName ccs -ScriptBlock {
     param($commandName, $wordToComplete, $commandAst, $fakeBoundParameters)
 
-    $commands = @('auth', 'doctor', 'sync', '--help', '--version', '--shell-completion', '-h', '-v', '-sc')
+    $commands = @('auth', 'doctor', 'sync', 'update', '--help', '--version', '--shell-completion', '-h', '-v', '-sc')
     $authCommands = @('create', 'list', 'show', 'remove', 'default', '--help', '-h')
     $shellCompletionFlags = @('--bash', '--zsh', '--fish', '--powershell')
     $listFlags = @('--verbose', '--json')

scripts/completion/ccs.zsh

@@ -16,7 +16,7 @@
 # Color codes: 0;34=blue, 0;32=green, 0;33=yellow, 2;37=dim white
 # Pattern format: =(#b)(group1)(group2)==color_for_group1=color_for_group2
 # The leading '=' means no color for whole match, then each '=' assigns to each group
-zstyle ':completion:*:*:ccs:*:commands' list-colors '=(#b)(auth|doctor|sync)([[:space:]]#--[[:space:]]#*)==0\;34=2\;37'
+zstyle ':completion:*:*:ccs:*:commands' list-colors '=(#b)(auth|doctor|sync|update)([[:space:]]#--[[:space:]]#*)==0\;34=2\;37'
 zstyle ':completion:*:*:ccs:*:model-profiles' list-colors '=(#b)(default|glm|glmt|kimi|[^[:space:]]##)([[:space:]]#--[[:space:]]#*)==0\;32=2\;37'
 zstyle ':completion:*:*:ccs:*:account-profiles' list-colors '=(#b)([^[:space:]]##)([[:space:]]#--[[:space:]]#*)==0\;33=2\;37'
 zstyle ':completion:*:*:ccs:*' group-name ''
@@ -35,6 +35,7 @@ _ccs() {
     'auth:Manage multiple Claude accounts'
     'doctor:Run health check and diagnostics'
     'sync:Sync delegation commands and skills'
+    'update:Update CCS to latest version'
   )
 
   # Define known settings profiles with descriptions (consistent padding)