refactor(config): extract applyCommonServerConfigFields to eliminate stdio/HTTP duplication

[Copilot]

Both the HTTP and stdio paths in config_stdin.go were setting the same 5 ServerConfig fields (Tools, ToolResponseFilters, Registry, GuardPolicies, Guard) plus an identical ToolTimeout nil-check — any new shared field required updating two places, with silent divergence risk (already happened with ConnectTimeout).

Changes

• New helper applyCommonServerConfigFields(cfg *ServerConfig, src *StdinServerConfig) — sets all shared fields in one place
• HTTP path (convertStdinServerConfig): removes inline field assignments, calls helper; ConnectTimeout remains HTTP-only
• stdio path (buildStdioServerConfig): removes inline field assignments and ToolTimeout nil-check, calls helper

func applyCommonServerConfigFields(cfg *ServerConfig, src *StdinServerConfig) {
    cfg.Tools = src.Tools
    cfg.ToolResponseFilters = src.ToolResponseFilters
    cfg.Registry = src.Registry
    cfg.GuardPolicies = src.GuardPolicies
    cfg.Guard = src.Guard
    if src.ToolTimeout != nil {
        cfg.ToolTimeout = *src.ToolTimeout
    }
}

[Copilot]

Pull request overview

This PR refactors stdin JSON server config conversion to reduce duplication between HTTP and stdio server handling by extracting shared ServerConfig field assignments into a single helper.

Changes:

• Introduces applyCommonServerConfigFields(cfg *ServerConfig, src *StdinServerConfig) to apply shared fields (Tools, ToolResponseFilters, Registry, GuardPolicies, Guard, and ToolTimeout when present).
• Updates the HTTP conversion path to use the helper while keeping ConnectTimeout HTTP-specific.
• Updates the stdio conversion path to use the helper and removes duplicated inline assignments / ToolTimeout nil-check.

Show a summary per file

File	Description
internal/config/config_stdin.go	Extracts common stdin→ServerConfig field application into a helper and uses it in both HTTP and stdio conversion paths to prevent drift.

Copilot's findings

Tip

Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

• Files reviewed: 1/1 changed files
• Comments generated: 0