BUG: paste duplicates input — clipboard content inserted twice

[jeonghun-jj-lee]

Summary

When copying text and pasting it in the Amicode chat input, the pasted content
appears twice (duplicated). The user expects the clipboard content to be inserted
exactly once.

Context

• Extension: harmoniqs.amicode 0.2.1
• OS: Darwin 25.5.0 arm64
• Engine: harmoniqs/opencode v1.18.10-amicode.4 (base v1.18.10)
• No active solve run at the time of filing.

Expected vs actual

• Expected: pasting inserts the clipboard content once.
• Actual: the clipboard content is inserted twice.

Diagnostics

• No active run; no run-id pointer applicable.
• diagnostics: inline

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intake: not-ready — mature per the maturity contract before picking up
suggested_path: A
diagnostics: inline
upstream: unable to check