Refactor Netracer into modular Ratatui components

.github/workflows/ci.yml

@@ -0,0 +1,36 @@
+name: Rust
+on:
+  push:
+    branches: ["refactor/modular-components"]
+  pull_request:
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  check:
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install stable Rust
+        run: rustup update stable --no-self-update && rustup default stable && rustup component add rustfmt clippy
+      - name: Format and resolve dependencies
+        run: cargo fmt --all && cargo generate-lockfile
+      - name: Check all targets
+        run: cargo check --locked --all-targets
+      - name: Test
+        run: cargo test --locked --all-targets
+      - name: Clippy
+        run: cargo clippy --locked --all-targets -- -D warnings
+      - name: Save reproducible sources
+        if: always()
+        uses: actions/upload-artifact@v4
+        with:
+          name: refactor-validation
+          path: |
+            Cargo.lock
+            src/
+            examples/
+          retention-days: 3

Cargo.toml

@@ -4,7 +4,12 @@ version = "0.1.0"
 edition = "2024"
 
 [dependencies]
-crossterm = "0.29.0"
+crossterm = { version = "0.29.0", features = ["event-stream"] }
+directories = "6.0"
+futures-util = "0.3"
 hostname = "0.4.2"
 netdev = "0.46.2"
 ratatui = "0.30.2"
+tempfile = "3"
+tokio = { version = "1", features = ["macros", "rt-multi-thread", "process", "time", "io-util", "sync"] }
+tui-input = { version = "0.15.4", default-features = false, features = ["crossterm"] }

examples/custom_tab.rs

@@ -0,0 +1,29 @@
+//! Run with: cargo run --example custom_tab
+//! A compiled extension: the core event loop and existing tabs do not change.
+use std::io;
+use netracer::{app::App, component::Component, tabs, terminal::TerminalSession};
+use ratatui::{Frame, layout::Rect, widgets::{Block, Borders, Paragraph}};
+
+struct NotesTab;
+
+impl Component for NotesTab {
+    fn id(&self) -> &'static str { "notes-example" }
+    fn title(&self) -> &'static str { "Notes" }
+    fn help(&self) -> &'static str { "Q/Esc: Quit" }
+    fn render(&mut self, frame: &mut Frame, area: Rect) {
+        frame.render_widget(
+            Paragraph::new("A third tab registered without changing App or Ping.")
+                .block(Block::default().title(" Extension example ").borders(Borders::ALL)),
+            area,
+        );
+    }
+}
+
+#[tokio::main]
+async fn main() -> io::Result<()> {
+    let mut components = tabs::builtins();
+    components.push(Box::new(NotesTab));
+    let mut app = App::new(components)?;
+    let mut terminal = TerminalSession::new()?;
+    app.run(terminal.terminal()).await
+}