feat: auto-fill custom provider prices from models.dev

[guillaumegay13]

Summary

• Index all chat-capable models.dev providers for custom-provider provider/model lookups.
• Auto-fill missing custom-provider input/output prices and context windows during probe/create/update when provider and model match models.dev.
• Fall back to exact model-ID matches from models.dev when the custom provider is not listed there, mark those imported prices as estimated, and show one estimate note beside the Models section.
• Pass provider_name from the frontend probe flow so detected models return imported prices in the custom-provider form.

Context

This is the second step after the model catalog cap increase. It preserves manual prices/context, leaves unmatched model IDs on the existing blank-price/default-context path, and only uses exact models.dev matches. It does not fuzzy-match or invent prices.

As of 2026-05-26, models.dev has no Mammouth/Mammoth provider. A Mammouth-style custom provider can still prefill prices for exact model IDs that models.dev knows, such as openai/gpt-4o-mini; unknown Mammouth-native model IDs remain blank.

Validation

• npm run build --workspace=packages/shared
• npm test --workspace=packages/backend -- models-dev-sync.service.spec.ts custom-provider.service.spec.ts custom-provider.controller.spec.ts
• npm test --workspace=packages/frontend -- CustomProviderForm.test.tsx api-extra.test.ts routing-extra.test.ts
• npm test --workspace=packages/frontend -- CustomProviderForm.test.tsx InfoTooltip.test.tsx api-extra.test.ts routing-extra.test.ts
• npm run build --workspace=packages/backend
• npm run build --workspace=packages/frontend (existing large Playground chunk warning)
• npm exec eslint -- packages/frontend/src/components/CustomProviderForm.tsx packages/frontend/src/components/InfoTooltip.tsx packages/frontend/src/services/api/routing.ts
• npm exec prettier -- --check packages/frontend/src/components/CustomProviderForm.tsx packages/frontend/src/components/InfoTooltip.tsx packages/frontend/src/styles/routing-providers.css
• git diff --check

---

Summary by cubic

Auto-fill custom provider model prices and context from models.dev using provider-name + model ID matches, with an exact model-only fallback marked as estimated. The form shows a single estimated-price tooltip beside Models, preserves user edits, and passes price_estimated through the API.

• New Features
  • Indexes all chat-capable models.dev providers (including non-native) for custom-provider lookups by display name/alias.
  • Fills missing input_price_per_million_tokens, output_price_per_million_tokens, and context_window on create/update/probe when matched; preserves user-entered values; leaves unmatched blank.
  • Adds exact model-only price fallback across providers (prefers official catalogs first) and flags these with price_estimated: true.
  • Adds price_estimated to DTO/entity and API in packages/backend and packages/frontend; probe accepts provider_name and returns enriched models.
  • Frontend sends provider_name during probe, renders one info tooltip for estimated prices, and submits price_estimated when applicable.

^{Written for commit 174d329. Summary will update on new commits. Review in cubic}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.41%. Comparing base (3f58729) to head (174d329).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2024   +/-   ##
=======================================
  Coverage   99.41%   99.41%           
=======================================
  Files         186      186           
  Lines       17321    17363   +42     
  Branches     6871     6884   +13     
=======================================
+ Hits        17220    17262   +42     
  Misses         99       99           
  Partials        2        2           

Flag	Coverage Δ
frontend	99.46% <100.00%> (+<0.01%)	⬆️
shared	97.85% <ø> (ø)

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[cubic-dev-ai]

No issues found across 13 files

_{Re-trigger cubic}

[cubic-dev-ai]

1 issue found across 11 files (changes from recent commits).

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[codecov]

Bundle Report

Changes will increase total bundle size by 2.04kB (0.1%) ⬆️. This is within the configured threshold ✅

Detailed changes

Bundle name	Size	Change
manifest-frontend-esm	2.06MB	2.04kB (0.1%) ⬆️

Affected Assets, Files, and Routes:

view changes for bundle: manifest-frontend-esm

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
assets/index-*.css	449 bytes	221.66kB	0.2%
assets/ProviderSelectModal-*.js	897 bytes	117.83kB	0.77%
assets/index-*.js	200 bytes	57.48kB	0.35%
assets/routing-*.js	1.93kB	35.88kB	5.68% ⚠️
assets/routing-*.js	18 bytes	3.93kB	0.46%
assets/providers-*.js	81 bytes	6.14kB	1.34%
assets/model-*.js	-1.53kB	488 bytes	-75.83%

Files in assets/ProviderSelectModal-*.js:

• ./src/components/CustomProviderForm.tsx → Total Size: 20.12kB

Files in assets/routing-*.js:

• ./src/components/InfoTooltip.tsx → Total Size: 3.06kB

Files in assets/routing-*.js:

• ./src/services/api/routing.ts → Total Size: 6.96kB