v0.1.50

Fixed

• Groq/Cerebras models selected for OpenCode were launched as NVIDIA models: providerKey was not passed in userSelected on Enter, causing all models to be prefixed with nvidia/ regardless of their actual provider — now correctly uses groq/model-id and cerebras/model-id
• startOpenCode and startOpenCodeDesktop: both functions now handle all 3 providers; Groq and Cerebras use OpenCode's built-in provider support (no custom config block needed, just GROQ_API_KEY/CEREBRAS_API_KEY env vars); NVIDIA retains its existing custom provider config flow

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