Release v0.3.0 with connected-folder and sandbox verification

[Kinfe123]

Prepare v0.3.0 so the installer ships the connected-folder client and environment-based startup already merged on main. Update the CLI/WASM version, website labels, setup guidance, and release instructions.

Expand the managed connected-folder check to pair from the current directory, exercise both read-only and writable modes, edit a file and read it back from disk, and revoke access. Add an opt-in live Vercel sandbox check covering real file I/O, native Node execution, and shared browser-protocol/native-terminal turns. Both automated checks use scripted model responses.

Validation:

• cargo test --locked, optimized CLI build, 13 installer tests, release smoke check, and setup PTY checks passed.
• Production site build and host suite passed, including managed connected-folder read/edit/read-back using the optimized v0.3.0 binary. PostgreSQL checks run in CI.
• Real Vercel sandbox check passed; the sandbox was stopped after verification.
• Production browser + real managed host/model + native terminal: paired a disposable local folder without --root, wrote and read back a file from the browser, appended a line from the terminal, verified both on disk and in the browser, and recovered the transcript after reload.

After merge, publish tag v0.3.0, wait for all four platform builds, then verify the production installer and downloaded artifacts.

[vercel]

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Project	Deployment	Actions	Updated
tress	Ready	Preview	Oct 7, 2026 5:56pm UTC