feat: replace hardcoded AI model constants with JSON seed catalog (#18818)

## Summary

- Replaces per-provider TypeScript constant files
(`openai-models.const.ts`, `anthropic-models.const.ts`, etc.) with a
single `ai-providers.json` catalog as the source of truth
- Adds runtime model discovery via AI SDK for self-hosted providers,
with `models.dev` enrichment for pricing/capabilities
- Introduces composite model IDs (`provider/modelId`) for canonical,
conflict-free identification
- Simplifies provider configuration: API keys are injected from
environment variables (e.g., `OPENAI_API_KEY`)
- Adds admin panel UI for provider management (add/remove/test), model
discovery, recommended model configuration, and default fast/smart model
selection per workspace
- Removes deprecated config variables (`AI_DISABLED_MODEL_IDS`,
`AUTO_ENABLE_NEW_AI_MODELS`, etc.)
- Adds database migration for composite model ID format

## Test plan

- [ ] Server typecheck passes
- [ ] Frontend typecheck passes
- [ ] Server unit tests pass
- [ ] Frontend unit tests pass
- [ ] CI pipeline green
- [ ] Admin panel AI tab loads correctly
- [ ] Provider discovery works for configured providers
- [ ] Model recommendation toggles persist
- [ ] Default fast/smart model selection works


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packages/twenty-front/src/modules/settings/admin-panel/ai/utils/getModelIcon.ts

@@ -0,0 +1,22 @@
+import { type IconComponent } from 'twenty-ui/display';
+
+import { MODEL_ICON_CONFIG } from '@/settings/admin-panel/ai/constants/ModelIconConfig';
+import { isModelIconKey } from '@/settings/admin-panel/ai/utils/isModelIconKey';
+import { getProviderIcon } from '@/settings/admin-panel/ai/utils/getProviderIcon';
+
+import { type ModelFamily } from '~/generated-metadata/graphql';
+
+export const getModelIcon = (
+  modelFamily: ModelFamily | null | undefined,
+  providerName?: string | null,
+): IconComponent => {
+  if (modelFamily && isModelIconKey(modelFamily)) {
+    return MODEL_ICON_CONFIG[modelFamily];
+  }
+
+  if (providerName) {
+    return getProviderIcon(providerName);
+  }
+
+  return MODEL_ICON_CONFIG.FALLBACK;
+};