Add Config Schema

Skill: Add a Dynamic Config Item

Feature ID: TR-F014

When to use

When adding a RADIUS runtime parameter that should be editable on the system config page.

Pre-research

view internal/app/config_schemas.json      # config schema (edit here first)
view internal/app/config_manager.go        # read / reload logic
view internal/adminapi/settings.go         # config endpoints
grep_search "GetSettingsStringValue\|GetSettingsInt64Value" --include internal/**

Implementation steps

1. Schema: add the config item to config_schemas.json with default / type / range / i18n key.
2. Read: read via app.GApp().GetSettings*Value("<group>", "<Key>"); do not hardcode.
3. Default initialization: confirm checkSettings() / init logic writes the default value.
4. Frontend: the system config page web/src/pages/SystemConfigPage.tsx renders from the schema automatically; customize only if a special control is needed.

Conventions

• A new config item must enter the schema before any code reads it.
• Type, range, default, and i18n key are all required.

Acceptance

• The config can be queried / edited / reloaded in the backend
• The new config read path has a test
• go test ./internal/app/... passes
• PR references TR-F014