fix(managed-runtime): secure auth and lifecycle control across runtimes (#437)

* feat: add OpenCode server authentication with auto-generated passwords

* fix(auth): separate user env and managed OpenCode password state

* fix(auth): enforce env precedence and managed password rotation across runtimes

* fix(vscode): rotate managed auth on startup and harden webview proxy

* build: add dev icons and config for Tauri desktop development

* fix(runtime): start managed OpenCode via CLI and expose active API port

* fix(managed-runtime): control OpenCode lifecycle and surface secure diagnostics

* docs: remove VS Code plugin test runbook

packages/desktop/src-tauri/Cargo.lock

@@ -1187,6 +1187,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2dff15bf788c671c1934e366d07e30c1814a8ef514e1af724a602e8a2fbe1b10"
 dependencies = [
  "futures-core",
+ "futures-sink",
 ]
 
 [[package]]
@@ -3411,6 +3412,7 @@ checksum = "9d0946410b9f7b082a427e4ef5c8ff541a88b357bc6c637c40db3a68ac70a36f"
 dependencies = [
  "base64 0.22.1",
  "bytes",
+ "futures-channel",
  "futures-core",
  "futures-util",
  "http",