v1.5.2

🔧 Fixes

• Auto-update now works for Program Files installs with UAC disabled (detects elevation, launches directly instead of failing on "runas")
• Double-click exe shows help instead of silent exit
• PATH changes broadcast immediately (no reboot needed)
• Friendly error messages for update failures
• Removed unnecessary "Signature verified" dialog
• Installer shows progress during update (/SILENT instead of /VERYSILENT)
• WM_SETTINGCHANGE broadcast for PATH
• Choco validExitCodes includes 3010
• Fixed stale doc comments in update.rs

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