feat: improve UX for ccs doctor and sync commands (#13)

* feat: enhance UX for 'ccs sync' and 'ccs doctor' commands

- Add ora spinners for real-time progress feedback
- Add cli-table3 for structured health check summary table
- Display detailed component information in doctor report
- Show file/directory counts during sync operations
- Improve visual hierarchy and readability
- Fix Unicode checkmark violation (replaced with [OK])

Breaking changes: None
Dependencies added: ora@^5.4.1, cli-table3@^0.6.5

Version bumped to 4.3.0

* fix: match doctor summary header width to table width

* feat: improve settings validation to check API keys, not just endpoints

- Check if API keys are configured or still placeholders
- Show 'Key configured' vs 'Placeholder key (not configured)'
- Previous message 'Valid (API: api.z.ai)' was misleading
- Now users can clearly see which profiles need API key configuration
- Warnings shown for placeholder keys (yellow [!])

* feat: add category grouping and alignment to doctor checks

- Group checks into logical categories: System, Configuration, Profiles & Delegation, System Health
- Add consistent padding (26 chars) for aligned columns
- Add 2-space indent for better visual hierarchy
- Separate categories with blank lines for better readability
- Much cleaner and easier to scan than before

* fix: perfect alignment for all doctor check output

- Use .padEnd(26) consistently for all component names
- Remove extra space before status icons
- Now all status icons [OK]/[X]/[!]/[i] align perfectly
- All component names pad to exactly 26 characters

lib/ccs

@@ -2,7 +2,7 @@
 set -euo pipefail
 
 # Version (updated by scripts/bump-version.sh)
-CCS_VERSION="4.2.0"
+CCS_VERSION="4.3.0"
 SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 readonly CONFIG_FILE="${CCS_CONFIG:-$HOME/.ccs/config.json}"
 readonly PROFILES_JSON="$HOME/.ccs/profiles.json"

lib/ccs.ps1

@@ -12,7 +12,7 @@ param(
 $ErrorActionPreference = "Stop"
 
 # Version (updated by scripts/bump-version.sh)
-$CcsVersion = "4.2.0"
+$CcsVersion = "4.3.0"
 $ScriptDir = Split-Path -Parent $MyInvocation.MyCommand.Path
 $ConfigFile = if ($env:CCS_CONFIG) { $env:CCS_CONFIG } else { "$env:USERPROFILE\.ccs\config.json" }
 $ProfilesJson = "$env:USERPROFILE\.ccs\profiles.json"