feat: add routing and model discovery for more API-key providers

[guillaumegay13]

Summary

• add routing and dynamic model discovery support for Cohere, Cerebras, Cloudflare Workers AI, GitHub Models, Groq, Hugging Face, LLM7.io, and Ollama Cloud
• use provider-native catalogs where needed, including Cloudflare account-scoped discovery and Hugging Face router model listing, while preserving provider-specific model IDs and handles in proxy routing
• add frontend provider metadata, validation, API-key help links, and logos for the new providers so discovered models are grouped under the connected host provider in the routing UI

Scope Notes

• Kluster was intentionally removed before submission because its product fit as a first-class inference provider was unclear and we could not validate a current general-purpose key flow
• the temporary provider-wide is_free tagging was removed; free filtering stays on the existing safe 0/0 pricing behavior rather than trying to infer provider free-tier access heuristically
• no database migrations required

Validation

• fork PR CI passed fully, including backend, frontend, shared, plugin, lint, changeset, and Cubic review
• local targeted backend tests: npm test --workspace=packages/backend -- --runInBand src/routing/model-discovery/provider-model-fetcher.service.spec.ts src/routing/routing.controller.spec.ts
• local targeted frontend tests: npm test --workspace=packages/frontend -- ModelPickerModal.test.tsx Routing.test.tsx
• local builds: npm run build --workspace=packages/shared, npm run build --workspace=packages/backend, npm run build --workspace=packages/frontend
• live smoke validation with real credentials for Cloudflare, GitHub Models, Cohere, Cerebras, Groq, Hugging Face, LLM7.io, and Ollama Cloud

Notes

• Cloudflare Workers AI currently uses ACCOUNT_ID:API_TOKEN in the existing API key field so the backend can derive the account-scoped base URL without adding a new settings surface
• plugin asset hashes were regenerated from a fresh build during merge resolution rather than hand-picked from either side of the conflict

[codecov]

Codecov Report

❌ Patch coverage is 94.73684% with 10 lines in your changes missing coverage. Please review.
✅ Project coverage is 98.65%. Comparing base (c7b396f) to head (79ffb5d).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1283      +/-   ##
==========================================
- Coverage   98.76%   98.65%   -0.11%     
==========================================
  Files         103      103              
  Lines        7280     7456     +176     
  Branches     2822     2856      +34     
==========================================
+ Hits         7190     7356     +166     
- Misses         81       88       +7     
- Partials        9       12       +3     

Flag	Coverage Δ
frontend	98.71% <94.70%> (-0.12%)	⬇️
manifest	100.00% <ø> (ø)
plugin	96.01% <ø> (ø)
shared	100.00% <100.00%> (ø)

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[codecov]

Bundle Report

Changes will increase total bundle size by 17.18kB (3.3%) ⬆️. This is within the configured threshold ✅

Detailed changes

Bundle name	Size	Change
manifest-frontend-esm	537.63kB	17.18kB (3.3%) ⬆️

Affected Assets, Files, and Routes:

view changes for bundle: manifest-frontend-esm

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
assets/index-*.css	94 bytes	115.63kB	0.08%
assets/Routing-*.js	428 bytes	83.98kB	0.51%
assets/ProviderIcon-*.js	16.28kB	43.8kB	59.16% ⚠️
assets/provider-*.js	379 bytes	1.16kB	48.4% ⚠️

Files in assets/Routing-*.js:

• ./src/pages/RoutingTierCard.tsx → Total Size: 12.65kB

• ./src/components/ModelPickerModal.tsx → Total Size: 15.23kB

Files in assets/ProviderIcon-*.js:

• ./src/services/providers.ts → Total Size: 7.69kB

• ./src/services/provider-utils.ts → Total Size: 3.46kB

• ./src/components/ProviderIcon.tsx → Total Size: 36.69kB

• ./src/services/routing-utils.ts → Total Size: 1.24kB

Files in assets/provider-*.js:

• ./src/services/provider-api-key-urls.ts → Total Size: 1.47kB

[cubic-dev-ai]

No issues found across 33 files