fix(openclaw): preserve plugin tool results

[kriptoburak]

What / Why / How

OpenClaw tools outside the built-in mapping fell through to a generic event. That event kept only the tool name, parameters, and duration. It discarded the normalized result, so plugin output disappeared from session continuity after compaction.

TweetClaw reproduces this with its tweetclaw tool and standard text-content result. Preserve the normalized result in the generic event. This also fixes the same data loss for other OpenClaw plugin tools without adding vendor-specific runtime logic.

Affected platforms

• Claude Code
• Cursor
• VS Code Copilot (GitHub Copilot)
• JetBrains Copilot
• Gemini CLI
• Qwen Code
• OpenCode
• KiloCode
• Codex CLI
• OpenClaw (Pi Agent)
• Pi
• Kiro
• Antigravity
• Zed
• All platforms

Test plan

• Added a regression using the real TweetClaw tool name, request shape, and result envelope.
• Confirmed the test failed before the fix: 1 failed, 99 passed.
• npm exec -- vitest run tests/plugins/openclaw.test.ts: 100 passed.
• npm run typecheck: passed.
• npm test: 213 files passed, 4,779 tests passed, 21 skipped. Build and bundle assertions passed.

Checklist

• Tests added/updated (TDD: red → green)
• npm test passes
• npm run typecheck passes
• Docs reviewed; no user-facing contract changed
• No Windows path regressions (no paths changed)
• Targets next branch (unless hotfix)

Cross-platform notes

This change adds no file paths or platform-specific behavior.