Originally created by: sosidudku1
Part of [#62] (the Related item).
Re-running the provider wizard for an existing openai-compatible entry opens the base_url step on an empty field. Pressing Enter through it falls back to https://api.openai.com and silently clobbers a custom endpoint (vLLM, LM Studio). A user re-running the wizard just to change the model can break their setup without noticing.
ProviderRow now carries the stored baseUrl, and both configure-mode entry points (the providers panel c binding and the LLM panel row action) pass it into createProvidersWizardState, which prefills baseUrlLine. Enter through the step now keeps the custom URL; clearing the field still applies the default.
Two new tests on the wizard state prefill. src/tui/providers and src/tui/llm-panel: all passing except the one llm-panel-selectors failure that is pre-existing on main (documented in [#50]). tsc --noEmit clean.
Ticket changed by: Ooooze