Add GitHub issue triage model flow

[VincentShipsIt]

Summary

• add model-backed GitHub issue triage for Todo issues
• add triage model settings and Kanban toolbar action
• persist triage settings and add focused triage parser tests

Verification

• bunx vitest run packages/agents/src/github/issue-triage.test.ts packages/shared/src/model-catalog.test.ts
• bunx biome check apps/desktop/src/main/ipc/register-github-handlers.ts apps/desktop/src/renderer/components/ThreadPanel.tsx apps/desktop/src/renderer/components/settings-panel/PipelineSettingsSection.tsx packages/agents/src/github/gh-cli.ts packages/agents/src/github/issue-triage.test.ts packages/agents/src/github/issue-triage.ts packages/agents/src/index.ts packages/db/src/queries/settings.ts packages/shared/src/constants.ts packages/shared/src/ipc-channels.ts packages/shared/src/model-catalog.test.ts packages/shared/src/model-catalog.ts packages/shared/src/types.ts packages/ui/src/KanbanBoard.tsx packages/ui/src/kanban-board/BoardToolbar.tsx packages/ui/src/kanban-board/types.ts --files-ignore-unknown=true
• bun run typecheck --filter=@shipcode/agents --filter=@shipcode/shared --filter=@shipcode/db --filter=@shipcode/ui --filter=@shipcode/desktop

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[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Compute OpenRouter reasoning flag from effective effort

When triage uses OpenRouter, include_reasoning is based on the raw setting while reasoning.effort is normalized per model. For models where non-none settings are coerced to none (for example qwen/qwen3-coder:free), this sends a contradictory request (include_reasoning: true with effective effort none), which can trigger avoidable API errors or unexpected behavior. The non-triage OpenRouter provider already derives include_reasoning from the normalized effort, so this path should do the same.

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