fix(vscode): open subagents from board avatars

[marius-kilocode]

What Problem This Solves

Board-message subagent avatars are visible but do not provide a direct way to open the corresponding subagent.

Why This Change Was Made

Route board avatar activation through the existing subagent opener, preserving Agent Manager inspector behavior and sidebar viewer behavior. The navigation context keeps board rendering independent from VS Code-specific routing.

User Impact

Clicking or keyboard-activating a subagent avatar opens that session. Broadcast participant avatars use the same behavior, while the parent session marker remains non-clickable.

Evidence

• bun run compile from packages/kilo-vscode/
• bun test tests/unit/board-tool-render.test.ts from packages/kilo-vscode/
• bun test src/components/agent-avatar-identity.test.ts from packages/kilo-ui/
• Isolated VS Code Agent Manager launch completed without feature-related console errors

This PR is stacked on #13957.

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Files Reviewed (2 files)

• packages/kilo-vscode/webview-ui/src/components/chat/TaskToolExpanded.tsx
• packages/kilo-vscode/webview-ui/src/styles/tool-overrides.css

Previous Review Summaries (5 snapshots, latest commit a126080)

Current summary above is authoritative. Previous snapshots are kept for context only.

Previous review (commit a126080)

Status: No Issues Found | Recommendation: Merge

Files Reviewed (1 files)

• packages/kilo-ui/src/components/board-message.css

Previous review (commit 91821ac)

Status: No Issues Found | Recommendation: Merge

Files Reviewed (5 files)

• packages/kilo-ui/src/components/board-message.css
• packages/kilo-ui/src/components/board-message.tsx
• packages/kilo-ui/src/components/message-part.tsx
• packages/kilo-vscode/tests/fixtures/board-tool-render.tsx
• packages/kilo-vscode/webview-ui/src/components/chat/SwarmBoard.tsx

Previous review (commit 9bbd430)

Status: No Issues Found | Recommendation: Merge

Files Reviewed (1 files)

• packages/kilo-vscode/webview-ui/src/App.tsx

Previous review (commit e348118)

Status: No Issues Found | Recommendation: Merge

Files Reviewed (4 files)

• packages/kilo-ui/package.json
• packages/kilo-ui/src/components/board-message.tsx
• packages/kilo-vscode/tests/fixtures/board-tool-render.tsx
• packages/kilo-vscode/webview-ui/src/App.tsx

Previous review (commit fbc1a79)

Status: 2 Issues Found | Recommendation: Address before merge

Overview

Severity	Count
CRITICAL	0
WARNING	1
SUGGESTION	1

Issue Details (click to expand)

WARNING

File	Line	Issue
packages/kilo-ui/src/components/board-message.tsx	33	Clickable avatars become nested buttons inside tool triggers

SUGGESTION

File	Line	Issue
packages/kilo-vscode/webview-ui/src/App.tsx	3	Import via the kilo-ui package export

Files Reviewed (5 files)

• packages/kilo-ui/src/components/board-message.css - 0 issues
• packages/kilo-ui/src/components/board-message.tsx - 1 issue
• packages/kilo-ui/src/context/board-navigation.tsx - 0 issues
• packages/kilo-vscode/tests/fixtures/board-tool-render.tsx - 0 issues
• packages/kilo-vscode/webview-ui/src/App.tsx - 1 issue

Fix these issues in Kilo Cloud

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_{Reviewed by grok-4.6 · Input: 90.6K · Output: 9.1K · Cached: 391.7K}

_{Review guidance: REVIEW.md from base branch main}