Switch OpenAI classification to Responses API

[WZ]

Summary

• default /list to the caller's own items and add /list all for the team view
• add configurable openai_base_url for OpenAI-compatible endpoints
• switch OpenAI section classification to the Responses API with schema-constrained JSON output
• derive classification confidence locally instead of parsing model-emitted confidence
• route other OpenAI LLM calls through the configured base URL and update docs/examples

Testing

• GOCACHE=/tmp/reportbot-go-cache go test ./internal/config ./internal/integrations/llm ./internal/report ./internal/storage/sqlite
• GOCACHE=/tmp/reportbot-go-cache go test ./internal/integrations/slack -run 'TestHandleBlockActions_Nudge|TestResolveNudgeTarget|TestParseListScope|TestFormatItemDescriptionForList|TestFormatListItemText_AddsLineNumber'

[Copilot]

Pull request overview

Updates Slack /list behavior and migrates OpenAI integration toward OpenAI-compatible endpoints and the Responses API, aligning the bot’s UX and LLM calls with new configuration options.

Changes:

• Default /list to “mine” scope, add /list all, and propagate scope through pagination + edit/delete flows.
• Add configurable openai_base_url (YAML + env) and log it at startup.
• Switch OpenAI section classification to the Responses API with JSON-schema constrained output and derive confidence locally.

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
internal/integrations/slack/slack.go	Implements list scoping (mine/all), threads scope through interactions, and tweaks copy.
internal/integrations/slack/slack_logic_test.go	Adds unit test coverage for parseListScope.
internal/integrations/llm/llm.go	Adds Responses API request/response handling + JSON schema output for section classification; local confidence derivation.
internal/integrations/llm/llm_test.go	Updates tests for schema output + local confidence logic and adds Responses output extraction test.
internal/config/config.go	Adds openai_base_url to config, env override, default, and trailing-slash normalization.
internal/config/config_test.go	Verifies OpenAIBaseURL default and env override behavior.
internal/app/app.go	Logs OpenAIBaseURL on startup.
config.yaml	Documents openai_base_url and sets default.
README.md	Updates /list docs and adds OpenAI base URL + Responses API notes.

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[WZ]

Addressed and resolved all Copilot review threads.

Follow-up fixes included:

• OpenAI non-structured calls now omit schema payload fields unless explicitly needed.
• /list mine scope now falls back to caller AuthorID when Slack user lookup fails.
• UND section confidence handling now normalizes lowercase/variant values to canonical UND (with test coverage).
• Posting latest team report is now /generate-report post (and /generate-report post private), with docs/help updated.

Latest commits: 7e6a9ad, e2e0b64, 07927cd.