* feat(providers): add Conol web support
* fix(conol): preserve sessions and image turns
* fix(conol): pin session model and effort via /model endpoint
Conol ignores agentModel/agentEffort on POST /api/sessions, so every
session silently ran on the downgraded account default (the create
response reports modelDowngraded: true / effectiveModel).
Sessions are now created empty and configured out-of-band against
POST /api/sessions/{id}/model before the first turn is submitted, in the
order the web client uses: modelPreset, then agentModel, then agentEffort.
The ordering is load-bearing because the model call resets agentEffort to
null server-side.
Effort now defaults to xhigh when the caller does not pin one via the
-<effort> model suffix, and is clamped onto the ladder each model actually
advertises, so xhigh degrades to high on claude-sonnet-5 and is skipped
entirely for models without an effort ladder such as openrouter/fusion.
Model and effort are also dropped from the session binding key so switching
models re-pins the existing session instead of stranding it and losing the
conversation history. Re-pinning only happens on an actual change, so
steady-state follow-ups cost no extra round trips.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
