fix(provider): allow remote Ollama without OPENAI_API_KEY (#369)

[0xfandom]

Summary

• Remote Ollama base URLs (a host outside the loopback / RFC1918 range, or a domain like ollama.corp.example.com) were being rejected at startup with OPENAI_API_KEY is required when CLAUDE_CODE_USE_OPENAI=1 and OPENAI_BASE_URL is not local.
• Ollama doesn't need an API key; the user had to invent a phantom value just to clear validation.
• Extended getProviderValidationError to bypass the API-key requirement when the base URL looks like Ollama (port 11434 on any host, or ollama substring in hostname/pathname). isLikelyOllamaEndpoint already encoded these heuristics for tool-call gating in providerConfig.ts; exported it and reused so the rules stay in one place.

Impact

• user-facing impact: users can now point OPENAI_BASE_URL at a remote Ollama server (http://ollama.corp.example.com/v1, http://203.0.113.5:11434/v1, etc.) without setting OPENAI_API_KEY, matching the existing local-Ollama UX.
• developer/maintainer impact: isLikelyOllamaEndpoint is now exported. No call-site changes elsewhere.

Testing

• bun run build
• bun run smoke
• focused tests: bun test src/utils/providerValidation.test.ts — 10 pass, 4 new

Notes

• provider/model path tested: CLAUDE_CODE_USE_OPENAI=1 with non-local Ollama-shaped base URLs (my-ollama-server.example.com:11434, 203.0.113.5:11434, ollama.corp.example.com) — all clear validation; non-Ollama remote (api.openai.com) still requires the key.
• screenshots attached: n/a (validation message change only)
• follow-up work / known limitations: same heuristic semantics as isLikelyOllamaEndpoint already used for tool-call gating; if the matching surface needs to be tighter (e.g. require both port AND host hint), the change would land in providerConfig.ts and benefit both call sites.

Fixes #369

[gnanam1990]

Thanks for the PR! Scope is tight, fix addresses the root cause, and reusing the existing isLikelyOllamaEndpoint heuristic is the right call — keeps the rules in one place. Tests cover hostname, port, and the negative (non-Ollama remote still requires the key). CI green. LGTM.

[0xfandom]

Any update on this @kevincodex1

[0xfandom]

Rebased onto current main at 8cfe33b. #979 (Hicap) modified src/services/api/providerConfig.ts which we also touch (the isLikelyOllamaEndpoint export); rebase applied cleanly — Hicap added new descriptor wiring further down the file, our export function isLikelyOllamaEndpoint change at line 373 is untouched.

Same fix as before: 47 insertions, 4 deletions across providerConfig.ts + providerValidation.ts + providerValidation.test.ts. bun test src/utils/providerValidation.test.ts → 23/23.

@gnanam1990 — re-approval ping if it still looks good.

[0xfandom]

Rebased onto current main (post 0.9.2 release). Drift cleared with no conflicts — only src/services/api/providerConfig.ts + src/utils/providerValidation.{ts,test.ts} changed.

bun test src/utils/providerValidation.test.ts
→ 23 pass / 0 fail
bun run build → green

No logic changes since the prior approval.

[0xfandom]

Any update on this @kevincodex1 @gnanam1990