Add TUI notifications and attention sounds (disabled by default)

[kommander]

• Added TUI attention API for notifications, sounds, sound packs, and per-call focus behavior.
• Added internal notifications plugin for questions, permissions, session completion, and session errors.
• Added built-in audio assets and sound playback support.
• Added plugin sound pack registration with scoped cleanup and relative path resolution.
• Added TUI config for attention, with notifications disabled by default in v1.
• Added tests for attention behavior, notifications, config defaults, runtime boot, and plugin sound packs.
• Added v2 spec noting notifications should default to enabled in v2.

[Copilot]

Pull request overview

Adds a host-owned “attention” subsystem to the TUI plugin API to support desktop notifications and semantic sounds, plus a new internal notifications plugin that uses it (e.g., question/permission/session done/error).

Changes:

• Introduces api.attention (notify + soundboard) in the plugin API types and wiring.
• Adds TUI attention configuration (schema, resolution, path handling) and updates docs/fixtures/tests accordingly.
• Implements the host attention engine (createTuiAttention) with focus-aware delivery, sound packs, and built-in sounds; adds an internal notifications plugin.

Reviewed changes

Copilot reviewed 20 out of 67 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
packages/plugin/src/tui.ts	Adds attention-related types and exposes attention on TuiPluginApi.
packages/plugin/package.json	Bumps @opentui/* peer dependency minimums to >=0.2.7.
packages/opencode/test/fixture/tui-runtime.ts	Updates resolved TUI config fixture to include attention defaults/overrides.
packages/opencode/test/fixture/tui-plugin.ts	Extends test plugin API fixture with attention stub.
packages/opencode/test/config/tui.test.ts	Adds coverage for attention config defaults + overrides + path resolution.
packages/opencode/test/cli/tui/plugin-loader.test.ts	Adds coverage for scoped attention sound pack registration disposal + relative path resolution.
packages/opencode/test/cli/run/runtime.boot.test.ts	Updates boot config helper to include attention settings.
packages/opencode/test/cli/cmd/tui/notifications.test.ts	Adds tests for the internal notifications plugin behavior and deduping logic.
packages/opencode/test/cli/cmd/tui/attention.test.ts	Adds extensive tests for createTuiAttention behavior (focus gating, sanitization, sound packs, failures, disposal).
packages/opencode/src/cli/cmd/tui/plugin/runtime.ts	Adds scoped attention API + plugin-relative file resolution and disposes host attention on runtime dispose.
packages/opencode/src/cli/cmd/tui/plugin/internal.ts	Registers the new internal notifications plugin.
packages/opencode/src/cli/cmd/tui/plugin/api.tsx	Threads attention into the TUI plugin API factory.
packages/opencode/src/cli/cmd/tui/feature-plugins/system/notifications.ts	Implements internal TUI notifications via api.attention.notify.
packages/opencode/src/cli/cmd/tui/config/tui.ts	Adds attention config resolution, defaults, and relative-path resolution for sound overrides.
packages/opencode/src/cli/cmd/tui/config/tui-schema.ts	Adds attention config schema and allowed semantic sound names.
packages/opencode/src/cli/cmd/tui/attention.ts	Implements host attention engine (notifications + audio + soundboard + sanitization).
packages/opencode/src/cli/cmd/tui/app.tsx	Instantiates attention host and passes it to plugin API + runtime.
packages/opencode/src/audio.d.ts	Adds *.mp3 module typing for audio imports.
packages/opencode/specs/tui-plugins.md	Documents attention config and api.attention usage.
packages/opencode/package.json	Adds @opencode-ai/ui workspace dependency for bundled audio assets.
package.json	Bumps root @opentui/* versions to 0.2.7.
bun.lock	Lockfile updates for the new dependency and @opentui/* version bump.

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