ODIAN Launcher: hub, installer, local stack and remembered sign-in (M2)

- Tauri 2 + Svelte 5 hub in ODIAN dark: patch notes and roadmap, install and
  update progress, local stack status, settings with DHP and MCP addresses.
- crates/odian-packs: Rust installer for pack format v1 (signed manifests,
  resumable verified downloads from a DHP or an ODIAN drive), byte-compatible
  with ODIAN_MCP_Server's Python odian_packs.
- Local stack on 127.0.0.1: Postgres -> Engine API -> tile server -> Odian.exe,
  one Job Object, clean shutdown; database snapshot restore on a fresh PC only.
- Keycloak sign-in through the DHP's MCP, remembered until Sign out with a
  launcher session that renews the Engine token silently.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

src-tauri/Cargo.toml

@@ -0,0 +1,37 @@
+[package]
+name = "odian-launcher"
+version = "0.1.0"
+description = "ODIAN Launcher: installs, updates and runs ODIAN on an operator PC"
+authors = ["ODIAN"]
+license = ""
+repository = ""
+edition = "2021"
+rust-version = "1.81"
+
+[lib]
+name = "odian_launcher_lib"
+crate-type = ["staticlib", "cdylib", "rlib"]
+
+[build-dependencies]
+tauri-build = { version = "2.6.3", features = [] }
+
+[dependencies]
+odian-packs = { path = "../crates/odian-packs" }
+serde_json = "1.0"
+serde = { version = "1.0", features = ["derive"] }
+log = "0.4"
+tauri = { version = "2.11.3", features = [] }
+tauri-plugin-log = "2"
+tauri-plugin-opener = "2"
+tauri-plugin-dialog = "2"
+tokio = { version = "1", features = ["net", "io-util", "time", "sync", "macros", "rt-multi-thread", "fs"] }
+tokio-util = "0.7"
+reqwest = { version = "0.12", default-features = false, features = ["json", "rustls-tls", "stream"] }
+keyring = { version = "3", features = ["windows-native"] }
+url = "2"
+uuid = { version = "1", features = ["v4"] }
+junction = "1"
+
+[target.'cfg(windows)'.dependencies]
+# Win32_System_Threading gates JOBOBJECT_EXTENDED_LIMIT_INFORMATION (it embeds IO_COUNTERS).
+windows-sys = { version = "0.59", features = ["Win32_Foundation", "Win32_Security", "Win32_System_JobObjects", "Win32_System_Threading"] }