fix(desktop): preserve clipboard image paths for path-based MCP tools

[CreatorGhost]

Port of upstream anomalyco/opencode#36051. Clipboard-pasted images are persisted to a UUID temp dir and their file paths flow through desktop IPC/TUI so path-based MCP tools receive real files instead of losing the attachment. Verified: app unit tests 576 pass (the 1 i18n parity failure is pre-existing on dev — fixed separately by the anomalyco#36293 port), typecheck clean in app/tui/desktop.

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Review details

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: c2e5e42e-971f-4e1b-9684-82ffec32e977

📥 Commits

Reviewing files that changed from the base of the PR and between 67e2bd4 and 774bb58.

📒 Files selected for processing (10)

• packages/app/src/components/prompt-input.tsx
• packages/app/src/components/prompt-input/attachments.ts
• packages/app/src/context/platform.tsx
• packages/desktop/src/main/ipc.ts
• packages/desktop/src/preload/index.ts
• packages/desktop/src/preload/types.ts
• packages/desktop/src/renderer/index.tsx
• packages/tui/src/clipboard.ts
• packages/tui/src/component/prompt/index.tsx
• packages/tui/src/context/clipboard.tsx

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch clipboard-image-paths

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