chore(release): prepare v0.1.1

[rendyuwu]

What

Release prep for v0.1.1: the version is 0.1.1 everywhere it is set, and
CHANGELOG.md holds the dated [0.1.1] section in place of [0.1.0].

Why

v0.1.1 is the first release that attaches the extension zips (#17). The tag
is also the first real run of release.yml's publish-extension job.

How

• Version 0.1.0 to 0.1.1 in package.json, extension/package.json, both
  extension manifests, src-tauri/tauri.conf.json, src-tauri/Cargo.toml,
  src-tauri/subclave-proxy/Cargo.toml, the two workspace entries in
  src-tauri/Cargo.lock (cargo update --workspace, no dependency moved),
  and the Version row in SUBCLAVE.md.
• CHANGELOG.md: ## [0.1.1] - 06-10-2026 replaces the 0.1.0 section, which
  lives on in its GitHub Release. One Added line for the zips, and a line
  saying the app and the extension's code are unchanged, since the in-app
  updater shows this section as the update's notes. No line for Extension E2E: two fill.spec.ts popup tests fail intermittently in CI #15: it
  changed tests only.
• A patch bump: since v0.1.0, nothing under src/, src-tauri/src/ or
  extension/src/ changed.

Testing

• pnpm run lint:imports, pnpm run typecheck:scripts,
  pnpm run format:check, pnpm run verify (17/17),
  pnpm exec tsc --noEmit, pnpm run typecheck:extension, pnpm build.

• cargo fmt --all -- --check,
  cargo check --workspace --all-targets --locked,
  cargo clippy --workspace --all-targets --locked -- -D warnings,
  cargo test --workspace --locked (325 passed).

• Both extension builds and pnpm --filter subclave-extension zip: the
  manifest.json inside subclave-chrome.zip and subclave-firefox.zip
  reads 0.1.1.

• node scripts/release-notes.mjs v0.1.1 prints the 0.1.1 section and the
  macOS footer.

• pnpm exec tsc --noEmit clean

• Manual smoke-test of the affected feature

• (If you touched src-tauri/) cargo check clean

• (If UI) tested in pnpm tauri:dev (isolated dev data dir)

No code change, only version strings and docs.

Screenshots / GIFs

None. No UI change.

Notes for reviewer

• The CHANGELOG heading is dated 06-10-2026. A tag on another day needs that
  date moved first.