* fix(security): prevent String(undefined) coercion in credential inputs
When a prompter returns undefined (due to cancel, timeout, or bug),
String(undefined).trim() produces the literal string "undefined" instead
of "". This truthy string prevents secure fallbacks from triggering,
allowing predictable credential values (e.g., gateway password = "undefined").
Fix all 8 occurrences by using String(value ?? "").trim(), which correctly
yields "" for null/undefined inputs and triggers downstream validation or
fallback logic.
Fixes#8054
* fix(security): also fix String(undefined) in api-provider credential inputs
Address codex review feedback: 4 additional occurrences of the unsafe
String(variable).trim() pattern in auth-choice.apply.api-providers.ts
(Cloudflare Account ID, Gateway ID, synthetic API key inputs + validators).
* fix(test): strengthen password coercion test per review feedback
* fix(security): harden credential prompt coercion
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Co-authored-by: Peter Steinberger <steipete@gmail.com>
* feat: add LiteLLM provider types, env var, credentials, and auth choice
Add litellm-api-key auth choice, LITELLM_API_KEY env var mapping,
setLitellmApiKey() credential storage, and LITELLM_DEFAULT_MODEL_REF.
* feat: add LiteLLM onboarding handler and provider config
Add applyLitellmProviderConfig which properly registers
models.providers.litellm with baseUrl, api type, and model definitions.
This fixes the critical bug from PR #6488 where the provider entry was
never created, causing model resolution to fail at runtime.
* docs: add LiteLLM provider documentation
Add setup guide covering onboarding, manual config, virtual keys,
model routing, and usage tracking. Link from provider index.
* docs: add LiteLLM to sidebar navigation in docs.json
Add providers/litellm to both English and Chinese provider page lists
so the docs page appears in the sidebar navigation.
* test: add LiteLLM non-interactive onboarding test
Wire up litellmApiKey flag inference and auth-choice handler for the
non-interactive onboarding path, and add an integration test covering
profile, model default, and credential storage.
* fix: register --litellm-api-key CLI flag and add preferred provider mapping
Wire up the missing Commander CLI option, action handler mapping, and
help text for --litellm-api-key. Add litellm-api-key to the preferred
provider map for consistency with other providers.
* fix: remove zh-CN sidebar entry for litellm (no localized page yet)
* style: format buildLitellmModelDefinition return type
* fix(onboarding): harden LiteLLM provider setup (#12823)
* refactor(onboarding): keep auth-choice provider dispatcher under size limit
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Co-authored-by: Peter Steinberger <steipete@gmail.com>