## Description
Hardens the Captain model override preferences API so account-level
overrides follow the same feature-router contract used by runtime LLM
calls. The API now permits model and feature keys from `llm.yml`,
removes blank model overrides, rejects invalid saved model combinations,
and returns each feature's effective model, provider, and source for UI
clients.
Fixes https://linear.app/chatwoot/issue/CW-7425/test-new-models
## Type of change
- [ ] Bug fix (non-breaking change which fixes an issue)
- [x] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality not to work as expected)
- [ ] This change requires a documentation update
## How Has This Been Tested?
Verified the account preferences API and account model validation
behavior for valid overrides, invalid model values, unknown feature
keys, blank override removal, and effective model/provider/source
payload metadata.
- `eval "$(rbenv init -)" && bundle exec rspec
spec/controllers/api/v1/accounts/captain/preferences_controller_spec.rb
spec/models/account_spec.rb
spec/models/concerns/captain_featurable_spec.rb
spec/lib/llm/feature_router_spec.rb`
- `eval "$(rbenv init -)" && bundle exec rubocop
app/controllers/api/v1/accounts/captain/preferences_controller.rb
app/models/concerns/account_settings_schema.rb
app/models/concerns/captain_featurable.rb
spec/controllers/api/v1/accounts/captain/preferences_controller_spec.rb
spec/models/account_spec.rb
spec/models/concerns/captain_featurable_spec.rb
spec/lib/llm/feature_router_spec.rb`
- `git diff --check`
## Checklist:
- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my code
- [x] I have commented on my code, particularly in hard-to-understand
areas
- [ ] I have made corresponding changes to the documentation
- [ ] My changes generate no new warnings
- [x] I have added tests that prove my fix is effective or that my
feature works
- [x] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged and published in downstream
modules
# Pull Request Template
## Description
Routes Enterprise assistant, copilot, FAQ, contact memory,
action-classifier, and false-promise detector LLM paths through
feature-specific model resolution. `Llm::BaseAiService` now accepts
feature/account context and uses `Llm::FeatureRouter` when that context
is present, while retaining the installation-model fallback for
unmigrated callers. This also adds a `document_faq_generation` feature
default for generative FAQ/document content.
Linear: https://linear.app/chatwoot/issue/CW-7425/test-new-models
Depends on #14840
## Type of change
- [ ] Bug fix (non-breaking change which fixes an issue)
- [x] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality not to work as expected)
- [ ] This change requires a documentation update
## How Has This Been Tested?
- `bundle exec rspec spec/lib/llm/models_spec.rb
spec/enterprise/services/llm/base_ai_service_spec.rb
spec/enterprise/services/captain/copilot/chat_service_spec.rb
spec/enterprise/services/captain/llm/assistant_chat_service_spec.rb
spec/enterprise/services/captain/llm/faq_generator_service_spec.rb
spec/enterprise/services/captain/llm/conversation_faq_service_spec.rb
spec/enterprise/services/captain/llm/assistant_action_classifier_service_spec.rb
spec/enterprise/services/captain/llm/assistant_false_promise_service_spec.rb
spec/enterprise/jobs/captain/conversation/response_builder_job_spec.rb`
passed with 112 examples, 0 failures.
- `bundle exec rspec spec/models/concerns/captain_featurable_spec.rb
spec/models/account_spec.rb
spec/controllers/api/v1/accounts/captain/preferences_controller_spec.rb
spec/lib/llm/feature_router_spec.rb` passed with 87 examples, 0
failures.
- `bundle exec rubocop enterprise/app/services/llm/base_ai_service.rb
enterprise/app/services/captain/copilot/chat_service.rb
enterprise/app/services/captain/llm/assistant_chat_service.rb
enterprise/app/services/captain/llm/faq_generator_service.rb
enterprise/app/services/captain/llm/conversation_faq_service.rb
enterprise/app/services/captain/llm/contact_notes_service.rb
enterprise/app/services/captain/llm/contact_attributes_service.rb
enterprise/app/services/captain/llm/assistant_action_classifier_service.rb
enterprise/app/services/captain/llm/assistant_false_promise_service.rb
spec/enterprise/services/llm/base_ai_service_spec.rb
spec/enterprise/services/captain/copilot/chat_service_spec.rb
spec/enterprise/services/captain/llm/assistant_chat_service_spec.rb
spec/enterprise/services/captain/llm/faq_generator_service_spec.rb
spec/enterprise/services/captain/llm/conversation_faq_service_spec.rb
spec/enterprise/services/captain/llm/assistant_action_classifier_service_spec.rb
spec/enterprise/services/captain/llm/assistant_false_promise_service_spec.rb
spec/enterprise/jobs/captain/conversation/response_builder_job_spec.rb`
passed with no offenses.
- `bundle exec ruby -e "require 'yaml'; config =
YAML.load_file('config/llm.yml'); abort('missing
document_faq_generation') unless config.dig('features',
'document_faq_generation'); abort('missing default') unless
config.dig('features', 'document_faq_generation', 'default'); puts
'llm.yml ok'"` passed.
- `git diff --check` passed.
## Checklist:
- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my code
- [x] I have commented on my code, particularly in hard-to-understand
areas
- [ ] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [x] I have added tests that prove my fix is effective or that my
feature works
- [x] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged and published in downstream
modules
