feat: scaffold Tauri 2.0 backend foundation

Set up the Rust backend for Mission Control using Tauri 2.0:

Cargo Configuration:
- Cargo.toml: Tauri 2.0, serde, thiserror, tracing, mockall
  - Library crate (mission_control_lib) for testability
  - Binary crate for Tauri entry point
- Cargo.lock: Pinned dependencies for reproducible builds

Tauri Configuration (tauri.conf.json):
- App identifier: com.mission-control.app
- Window: 800x600, centered, hiddenTitle for clean macOS look
- Shell plugin scoped to lore, br, bv commands only
- Tray icon configured for background operation

Application Bootstrap:
- src/main.rs: Minimal entry point, delegates to lib
- src/lib.rs: Tracing setup, plugin registration, command handlers
  - Debug mode: auto-opens devtools
  - Safe window lookup (no unwrap panic)
- build.rs: Tauri build script for codegen

Architecture: The lib/bin split enables unit testing the Tauri
command handlers without launching the full app.

src-tauri/Cargo.toml

@@ -0,0 +1,41 @@
+[package]
+name = "mission-control"
+version = "0.1.0"
+description = "ADHD-centric personal productivity hub"
+authors = ["Taylor Eernisse"]
+edition = "2021"
+
+[lib]
+name = "mission_control_lib"
+crate-type = ["lib", "cdylib", "staticlib"]
+
+[[bin]]
+name = "mission-control"
+path = "src/main.rs"
+
+[build-dependencies]
+tauri-build = { version = "2", features = [] }
+
+[dependencies]
+tauri = { version = "2", features = ["tray-icon"] }
+tauri-plugin-shell = "2"
+serde = { version = "1", features = ["derive"] }
+serde_json = "1"
+tokio = { version = "1", features = ["full"] }
+thiserror = "2"
+tracing = "0.1"
+tracing-subscriber = { version = "0.3", features = ["env-filter"] }
+chrono = { version = "0.4", features = ["serde"] }
+dirs = "5"
+notify = "7"
+
+[dev-dependencies]
+tempfile = "3"
+mockall = "0.13"
+
+[profile.release]
+panic = "abort"
+codegen-units = 1
+lto = true
+opt-level = "z"
+strip = true

src-tauri/build.rs

@@ -0,0 +1,3 @@
+fn main() {
+    tauri_build::build()
+}

src-tauri/src/lib.rs

@@ -0,0 +1,47 @@
+//! Mission Control - ADHD-centric personal productivity hub
+//!
+//! This crate provides the Rust backend for Mission Control, handling:
+//! - CLI integration with lore (GitLab data) and br (beads task management)
+//! - GitLab → Beads bridge (creating beads from GitLab events)
+//! - Decision logging and state persistence
+//! - File watching for automatic sync
+
+pub mod commands;
+pub mod data;
+
+use tauri::Manager;
+use tracing_subscriber::{layer::SubscriberExt, util::SubscriberInitExt};
+
+/// Initialize the Tauri application with all plugins and commands.
+#[cfg_attr(mobile, tauri::mobile_entry_point)]
+pub fn run() {
+    // Initialize tracing
+    tracing_subscriber::registry()
+        .with(
+            tracing_subscriber::EnvFilter::try_from_default_env()
+                .unwrap_or_else(|_| "mission_control=debug".into()),
+        )
+        .with(tracing_subscriber::fmt::layer())
+        .init();
+
+    tracing::info!("Starting Mission Control");
+
+    tauri::Builder::default()
+        .plugin(tauri_plugin_shell::init())
+        .setup(|app| {
+            #[cfg(debug_assertions)]
+            {
+                // Open devtools in debug mode
+                if let Some(window) = app.get_webview_window("main") {
+                    window.open_devtools();
+                }
+            }
+            Ok(())
+        })
+        .invoke_handler(tauri::generate_handler![
+            commands::greet,
+            commands::get_lore_status,
+        ])
+        .run(tauri::generate_context!())
+        .expect("error while running tauri application");
+}

src-tauri/src/main.rs

@@ -0,0 +1,6 @@
+// Prevents additional console window on Windows in release, DO NOT REMOVE!!
+#![cfg_attr(not(debug_assertions), windows_subsystem = "windows")]
+
+fn main() {
+    mission_control_lib::run()
+}

src-tauri/tauri.conf.json

@@ -0,0 +1,72 @@
+{
+  "$schema": "https://schema.tauri.app/config/2",
+  "productName": "Mission Control",
+  "version": "0.1.0",
+  "identifier": "com.mission-control.app",
+  "build": {
+    "beforeDevCommand": "npm run dev",
+    "devUrl": "http://localhost:1420",
+    "beforeBuildCommand": "npm run build",
+    "frontendDist": "../dist"
+  },
+  "app": {
+    "withGlobalTauri": false,
+    "windows": [
+      {
+        "title": "Mission Control",
+        "width": 800,
+        "height": 600,
+        "resizable": true,
+        "fullscreen": false,
+        "center": true,
+        "hiddenTitle": true,
+        "decorations": true,
+        "transparent": false,
+        "visible": true
+      }
+    ],
+    "trayIcon": {
+      "iconPath": "icons/icon.png",
+      "iconAsTemplate": true
+    },
+    "security": {
+      "csp": null
+    }
+  },
+  "bundle": {
+    "active": true,
+    "icon": [
+      "icons/32x32.png",
+      "icons/128x128.png",
+      "icons/128x128@2x.png",
+      "icons/icon.icns",
+      "icons/icon.ico"
+    ],
+    "targets": "all",
+    "macOS": {
+      "minimumSystemVersion": "10.15"
+    }
+  },
+  "plugins": {
+    "shell": {
+      "open": true,
+      "scope": [
+        {
+          "name": "lore",
+          "cmd": "lore",
+          "args": true
+        },
+        {
+          "name": "br",
+          "cmd": "br",
+          "args": true
+        },
+        {
+          "name": "bv",
+          "cmd": "bv",
+          "args": true
+        }
+      ]
+    }
+  }
+}