feat: Add support for the --fresh flag again with host environment configuration injection

src/cli/mod.rs

@@ -30,7 +30,7 @@ use std::io::{Read, stdin};
 ",
 	group(
 		ArgGroup::new("sbx-mode")
-			.args(["sandbox"])
+			.args(["sandbox", "fresh"])
 			.multiple(true)
 			.conflicts_with_all([
 				"model", "prompt", "role", "session", "agent", "rag", "rebuild_rag",
@@ -227,6 +227,9 @@ pub struct Cli {
     /// Launch Coyote inside a Docker sandbox (via `sbx`); name defaults to current directory basename
     #[arg(long, value_name = "NAME", help_heading = "Sandbox")]
     pub sandbox: Option<Option<String>>,
+    /// Start the sandbox with a clean slate — no copied config or tokens; LLM credentials injected via sbx proxy
+    #[arg(long, requires = "sandbox", help_heading = "Sandbox")]
+    pub fresh: bool,
     /// Display information
     #[arg(long, help_heading = "Diagnostics & Tools")]
     pub info: bool,