feat(history): delete a topic from the list (topic-index crate, room_log, room.rs, session.rs, pty.rs, index.html, main.ts, styles.css, CI, docs)

.github/workflows/ci.yml

@@ -66,6 +66,10 @@ jobs:
         working-directory: crates/room-floor
         run: cargo test
 
+      - name: Test the topic-index crate
+        working-directory: crates/topic-index
+        run: cargo test
+
   # Gate job: single Required status check for branch protection.
   # Add new jobs to `needs` when CI grows. No Settings change needed.
   CI:

README.md

@@ -193,6 +193,7 @@ src/                  チャットルーム UI（TypeScript）
 src-tauri/src/        Tauri、部屋ソケット、PTY、設定・セッション保存の Rust 実装
 crates/mcp-config/    .mcp.json 登録と起動フラグ検査（tauri 非依存、テスト対象）
 crates/room-floor/    同時発話の順序付け（tauri 非依存、テスト対象）
+crates/topic-index/   トピックの保存と索引の照合（tauri 非依存、テスト対象）
 portable-pty-patch/   Windows 対応を含む portable-pty のローカルパッチ
 .github/workflows/    Windows CI とリリース用 CD
 ```

crates/topic-index/Cargo.toml

@@ -0,0 +1,22 @@
+[package]
+name = "topic-index"
+version = "0.1.0"
+description = "The topics of a Pullcept room: a directory of topic files, and the index that annotates it"
+authors = ["Liplus Project Contributors"]
+license = "Apache-2.0"
+edition = "2021"
+
+# Deliberately free of tauri, for the reason docs/0-requirements.md gives under
+# テストの配置: a test binary that links the tauri dependency tree does not load
+# on the GNU target, so pure logic left in `src-tauri/src/` is unverifiable the
+# moment it is written. The reconciliation between the directory and the index
+# was named there as the piece that had outgrown "read it and check" and
+# belonged in a crate; deleting a topic is what made that load-bearing (#119),
+# because a delete that left the file behind is undone by the next read.
+
+[dependencies]
+serde = { version = "1", features = ["derive"] }
+serde_json = "1"
+
+[dev-dependencies]
+uuid = { version = "1", features = ["v4"] }