feat(v2): scaffold Tauri 2.x + Svelte 5 project (Phase 1)

- Tauri 2.10 + Svelte 5.45 + TypeScript + Vite 7
- Catppuccin Mocha theme with CSS variables and semantic aliases
- CSS Grid layout: sidebar (260px) + workspace, responsive breakpoints
  for ultrawide (3440px+) and narrow (<1200px)
- Component structure: Layout/, Terminal/, Agent/, Markdown/, Sidebar/
- Svelte 5 stores with $state runes: sessions, agents, layout
- SDK message adapter (abstracts Agent SDK wire format)
- PTY bridge (Tauri IPC wrapper, stubbed for Phase 2)
- Node.js sidecar entry point (stdio NDJSON, stubbed for Phase 3)
- Rust modules: pty, sidecar, watcher, session (stubbed)
- Vite dev server on port 9700
- Build verified: binary + .deb + .rpm + AppImage all produced

v2/src-tauri/.gitignore

@@ -0,0 +1,4 @@
+# Generated by Cargo
+# will have compiled files and executables
+/target/
+/gen/schemas

v2/src-tauri/Cargo.toml

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+[package]
+name = "bterminal"
+version = "0.1.0"
+description = "Multi-session Claude agent dashboard"
+authors = ["DexterFromLab"]
+license = "MIT"
+edition = "2021"
+rust-version = "1.77.2"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[lib]
+name = "bterminal_lib"
+crate-type = ["staticlib", "cdylib", "rlib"]
+
+[build-dependencies]
+tauri-build = { version = "2.5.6", features = [] }
+
+[dependencies]
+serde_json = "1.0"
+serde = { version = "1.0", features = ["derive"] }
+log = "0.4"
+tauri = { version = "2.10.3", features = [] }
+tauri-plugin-log = "2"

v2/src-tauri/build.rs

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+fn main() {
+  tauri_build::build()
+}

v2/src-tauri/capabilities/default.json

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+{
+  "$schema": "../gen/schemas/desktop-schema.json",
+  "identifier": "default",
+  "description": "enables the default permissions",
+  "windows": [
+    "main"
+  ],
+  "permissions": [
+    "core:default"
+  ]
+}

v2/src-tauri/src/lib.rs

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+#[cfg_attr(mobile, tauri::mobile_entry_point)]
+pub fn run() {
+  tauri::Builder::default()
+    .setup(|app| {
+      if cfg!(debug_assertions) {
+        app.handle().plugin(
+          tauri_plugin_log::Builder::default()
+            .level(log::LevelFilter::Info)
+            .build(),
+        )?;
+      }
+      Ok(())
+    })
+    .run(tauri::generate_context!())
+    .expect("error while running tauri application");
+}

v2/src-tauri/src/main.rs

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+// Prevents additional console window on Windows in release, DO NOT REMOVE!!
+#![cfg_attr(not(debug_assertions), windows_subsystem = "windows")]
+
+fn main() {
+  bterminal_lib::run();
+}

v2/src-tauri/src/pty.rs

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+// PTY management via portable-pty
+// Phase 2: spawn, resize, I/O streaming to frontend

v2/src-tauri/src/session.rs

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+// Session persistence via rusqlite
+// Phase 4: CRUD, layout save/restore

v2/src-tauri/src/sidecar.rs

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+// Node.js sidecar lifecycle management
+// Phase 3: spawn, restart, health check, stdio NDJSON communication

v2/src-tauri/src/watcher.rs

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+// File watcher for markdown viewer
+// Phase 4: notify crate, debounce, Tauri events

v2/src-tauri/tauri.conf.json

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+{
+  "$schema": "https://schema.tauri.app/config/2",
+  "productName": "bterminal",
+  "version": "0.1.0",
+  "identifier": "com.dexterfromlab.bterminal",
+  "build": {
+    "frontendDist": "../dist",
+    "devUrl": "http://localhost:9700",
+    "beforeDevCommand": "npm run dev",
+    "beforeBuildCommand": "npm run build"
+  },
+  "app": {
+    "windows": [
+      {
+        "title": "BTerminal",
+        "width": 1920,
+        "height": 1080,
+        "resizable": true,
+        "fullscreen": false,
+        "decorations": true
+      }
+    ],
+    "security": {
+      "csp": null
+    }
+  },
+  "bundle": {
+    "active": true,
+    "targets": "all",
+    "icon": [
+      "icons/32x32.png",
+      "icons/128x128.png",
+      "icons/128x128@2x.png",
+      "icons/icon.icns",
+      "icons/icon.ico"
+    ]
+  }
+}