[Feat] Add provider model mapping presets

[roomote-roomote]

Opened on behalf of Bruno Bergher. Follow up by mentioning @roomote-roomote, in the web UI, or in Slack.

What changed

Adds provider-local model mapping presets with arbitrary identifiers and labels. Settings now groups presets by connected provider, marks the provider default, confirms the selected mapping before it applies, and adds or enables referenced models on demand.

The catalog includes OpenRouter Balanced and Quick turnaround presets. Existing providers that still use recommendedRoleModels receive a synthesized Recommended default preset for backward compatibility. Preset models now retain their explicit or display-name-derived family instead of treating the provider segment as a family.

Why this change was made

Operators need provider-defined mappings that can express role-specific model and reasoning choices without forcing every referenced model into the normal suggested catalog.

Impact

Connecting a provider seeds only its default preset models; non-default-only models are added only when that preset is selected. Environment-managed model and reasoning fields remain independently protected from preset updates, and inherited-role previews follow the effective env-managed coding model.

Screenshots

[roomote-roomote]

No new code issues found. See task

• apps/web/src/trpc/commands/task-models/auto-add-models.ts:191-195 Preserve an absent family so buildTaskModelOption infers it from the display name instead of using the provider ID.
• apps/web/src/components/settings/ModelSettingsSection.tsx:1635-1639 Preview inherited roles with the effective env-managed coding model, while non-env previews use the selected preset coding model.
• apps/web/src/components/settings/ModelSettingsSection.tsx:1637-1643 Match preset display metadata to the resolved model ID. An env-managed model outside the catalog can currently be labeled with a different preset model's display name, while inherited roles omit the coding preset's display name and show its raw slug.

_{Reviewed 258bf5b}

[roomote-roomote]

Fixed both review findings in f1d5c7a: preset model families now fall back from display names instead of provider IDs, and inherited-role previews use the effective coding model only when R_MODEL manages coding. Focused tests, typechecking, and refreshed visual proof passed.