Initial scaffold from M1 spike (tiletopia)

Tauri 2 + Svelte 5 + xterm.js + portable-pty. Single full-window
WSL terminal pane with clickable distro picker. M1 verified manually
on Windows: window opens, xterm.js renders, claude TUI works,
resize reflows cleanly.

Graduated from ~/claude/ideas/wsl-mux/ per the approved plan at
~/.claude/plans/imperative-coalescing-feigenbaum.md. See memory.md
for decisions, open TODOs, and the M2-M5 roadmap.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src-tauri/src/lib.rs

@@ -0,0 +1,28 @@
+//! Library entry point. `main.rs` calls `run()`.
+
+mod commands;
+mod pty;
+
+use crate::pty::PtyManager;
+
+pub fn run() {
+    let _ = tracing_subscriber::fmt()
+        .with_env_filter(
+            tracing_subscriber::EnvFilter::try_from_default_env()
+                .unwrap_or_else(|_| tracing_subscriber::EnvFilter::new("info")),
+        )
+        .with_writer(std::io::stderr)
+        .try_init();
+
+    tauri::Builder::default()
+        .manage(PtyManager::new())
+        .invoke_handler(tauri::generate_handler![
+            commands::list_distros,
+            commands::spawn_pane,
+            commands::write_to_pane,
+            commands::resize_pane,
+            commands::kill_pane,
+        ])
+        .run(tauri::generate_context!())
+        .expect("error while running tauri application");
+}