Config Mismatch Warning Incorrectly Triggered with Identical Values

Bug Description
Title: Config mismatch warning shows incorrect information

Version: Claude Code v1.0.69

Issue:
/status shows "Config mismatch: running npm-global but config says npm-global"
even when both values are identical.

Steps to Reproduce:

1. Install Claude Code via npm: npm install -g @anthropic-ai/claude-code
2. Set config: claude config set -g installMethod npm-global
3. Run: claude, then /status
4. See incorrect warning

Expected: No warning when values match
Actual: Warning shows despite matching values

Diagnostic Output:

• /doctor shows: "Currently running: npm-global" and "Config install method: npm-global"
• /status shows: "Config mismatch: running npm-global but config says npm-global"

Environment:

• macOS (MacBook Air)
• Node.js v22.18.0
• npm v10.9.3
• Install method: npm global

Environment Info

• Platform: darwin
• Terminal: Apple_Terminal
• Version: 1.0.69
• Feedback ID: ee20e4ed-e69e-4239-901c-8f33837f88fc