chore(release): bump to v0.1.2

Workspace 0.1.1 -> 0.1.2; rtcom-core path-version dep mirrored.

CHANGELOG promotes the [Unreleased] block into a new [0.1.2]
section. Two entries:

- Added: --lower-dtr / --raise-dtr / --lower-rts / --raise-rts
  flags (closes issue #1).
- Fixed: -V now embeds the git hash for crates.io builds too —
  the previous "rtcom 0.1.1" without hash was the user-reported
  trigger for this release.

Cargo.lock auto-bumped by cargo build.

Author: Tianshuang Ke

CHANGELOG.md

@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.1.2] — 2026-04-17
+
 ### Added
 
 - `--lower-dtr` / `--raise-dtr` / `--lower-rts` / `--raise-rts`
@@ -18,6 +20,17 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   cached state stays honest and the first `^A t` / `^A g` toggle
   produces the right transition. Closes [#1].
 
+### Fixed
+
+- `rtcom -V` now embeds the git commit hash for `cargo install`
+  builds too, not just local `cargo install --path` checkouts.
+  v0.1.1 from crates.io showed `rtcom 0.1.1` (no hash) because
+  `build.rs`'s `git rev-parse` had no `.git` to read. The release
+  workflow now writes `crates/rtcom-cli/.commit-hash` before
+  `cargo publish`; `build.rs` falls back to that file when git
+  is unavailable. Tarball builds therefore show
+  `rtcom 0.1.2 (abc12345)`.
+
 [#1]: https://github.com/TrekMax/rtcom/issues/1
 
 ## [0.1.1] — 2026-04-17
@@ -166,6 +179,7 @@ use cases.
 - GitHub Actions CI matrix (ubuntu / macos / windows) running fmt,
   clippy `-D warnings`, tests, and `cargo doc -D warnings`.
 
-[Unreleased]: https://github.com/TrekMax/rtcom/compare/v0.1.1...HEAD
+[Unreleased]: https://github.com/TrekMax/rtcom/compare/v0.1.2...HEAD
+[0.1.2]: https://github.com/TrekMax/rtcom/releases/tag/v0.1.2
 [0.1.1]: https://github.com/TrekMax/rtcom/releases/tag/v0.1.1
 [0.1.0]: https://github.com/TrekMax/rtcom/releases/tag/v0.1.0

Cargo.lock

@@ -3,7 +3,7 @@ members = ["crates/*"]
 resolver = "2"
 
 [workspace.package]
-version = "0.1.1"
+version = "0.1.2"
 edition = "2021"
 rust-version = "1.85"
 license = "Apache-2.0"
@@ -26,7 +26,7 @@ anyhow = "1"
 tracing = "0.1"
 tracing-subscriber = { version = "0.3", features = ["env-filter"] }
 bytes = "1"
-rtcom-core = { path = "crates/rtcom-core", version = "0.1.1" }
+rtcom-core = { path = "crates/rtcom-core", version = "0.1.2" }
 
 [workspace.lints.rust]
 unsafe_code = "deny"