ci: build and link the Linux Fcitx5 plugin

[nervouna]

PR #63 tests the portable core and standalone frontend helpers without compiling or linking the Fcitx5 plugin. This adds the actual CMake configure, plugin build/link and CTest steps to the existing Linux portable job, reusing the debug Rust static library produced by test.sh / abi.sh and the pinned librime.so. There is no second Rust or Rime build. The C++ addon uses Release, --no-undefined rejects unresolved addon/ABI symbols, and CTest fails if no tests are found.

The portable job uses Ubuntu 26.04's Fcitx5 5.1.19 development packages. Ubuntu 24.04's Fcitx5 5.1.7 lacks CandidateWord::setComment, as demonstrated by the build failure. The native cache is scoped to Ubuntu 26.04 to avoid restoring outputs from the previous distribution toolchain. Other jobs and the portable check name are preserved. Production code, release packaging, existing isolated tests and ARM64 Omarchy verification records are unchanged.

Validation

At db2867679bb8ed4ff88f2ad622275cfa9921e203:

• Linux CI: all four jobs passed.
• Portable/plugin job: started without a cache; GCC 15.2.0 compiled both plugin sources and linked libinkflow.so with Fcitx5 5.1.19, cargo/debug/libinkflow_rime.a and the pinned librime.so. The verbose command confirms --no-undefined. CTest passed 1/1, with -UNDEBUG preserving helper assertions in Release.
• Existing runtime fixtures, 291 ranking comparisons and isolated C ABI checks passed; the script job passed 18 remote-script tests, 20 installer tests and frontend helper tests.
• macOS test.sh quick: passed.
• Local helper checks and git diff --check passed. The 20 installer tests passed with TMPDIR=/private/tmp; macOS's default /var alias initially exposed an existing canonical-path comparison in the test. actionlint 1.7.12 passed with only the independently verified ubuntu-26.04 label warning suppressed, since its label list does not include that hosted runner yet.

Coverage boundary

• Compilation and linkage: real Fcitx5 headers/libraries, both C++ plugin sources, the Rust static library and pinned Rime on Linux x86-64. This reuses the debug Rust profile; it is not a release-package build.
• Behavior: CTest currently runs only the pure bridge helpers. Existing isolated core/ABI and installer tests remain. Production-resource engine/personal-data/quality parity and production C ABI checks were explicitly skipped because no prepared production resources were supplied.
• Desktop acceptance: addon loading, real application typing/focus, actual personal-data migration, installed upgrade/rollback and desktop integration still require the existing installed-addon tests and Omarchy or other target-device validation. Steam Deck/KDE Plasma validation remains deferred. The input method was not installed or activated.

This PR targets portable-core at a385c59, so its review contains only the CI and documentation changes. It does not merge #63 or this PR.

Refs #63, #36.

[chatgpt-codex-connector]

Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-10-10T10:02:14.612404Z	c4628e9	PR opened

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