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/styles.css

@@ -0,0 +1,65 @@
+:root {
+  color-scheme: dark;
+  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
+  font-size: 13px;
+  background: #0c0c0c;
+  color: #e6e6e6;
+}
+
+html,
+body,
+#app {
+  margin: 0;
+  padding: 0;
+  height: 100%;
+  width: 100%;
+  overflow: hidden;
+}
+
+.app {
+  display: flex;
+  flex-direction: column;
+  height: 100vh;
+  background: #0c0c0c;
+}
+
+.titlebar {
+  flex: 0 0 auto;
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  padding: 6px 12px;
+  background: #1a1a1a;
+  border-bottom: 1px solid #2a2a2a;
+  font-size: 12px;
+  color: #aaa;
+  user-select: none;
+}
+
+.titlebar .label {
+  font-weight: 600;
+  color: #ddd;
+}
+
+.titlebar .distro {
+  font-family: "Cascadia Mono", "JetBrains Mono", "Consolas", monospace;
+  color: #88c;
+}
+
+.titlebar .status {
+  margin-left: auto;
+  font-family: "Cascadia Mono", "JetBrains Mono", "Consolas", monospace;
+}
+
+.titlebar .status.ok {
+  color: #6c6;
+}
+.titlebar .status.err {
+  color: #d66;
+}
+
+.pane-wrap {
+  flex: 1 1 auto;
+  min-height: 0;
+  position: relative;
+}