2.1.4: fix blank exit-node rendering, relabel for clarity

"(exit: , optional)" printed with nothing after the colon whenever no
Tailscale exit node was configured (the default). Now renders "none",
and relabels "exit:" to "exit node:" -- the abbreviated form read as an
exit *code* at a glance, which is what led to this being misdiagnosed
as a process-exit-code formatting bug in the first place.

Cargo.lock

@@ -54,7 +54,7 @@ dependencies = [
 
 [[package]]
 name = "breadcrumbs"
-version = "2.1.3"
+version = "2.1.4"
 dependencies = [
  "clap",
  "serde",

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "breadcrumbs"
-version = "2.1.3"
+version = "2.1.4"
 edition = "2021"
 description = "Profile-aware Wi-Fi state machine with Tailscale handling and self-healing watch daemon"
 license = "MIT"

src/main.rs

@@ -330,10 +330,10 @@ fn cmd_status(
         (Some(h), req) => {
             let ok = h.is_ok();
             println!(
-                "  tailscale   {} {} {C_DIM}(exit: {}{}){C_RESET}",
+                "  tailscale   {} {} {C_DIM}(exit node: {}{}){C_RESET}",
                 dot(ok || !req),
                 h.describe(),
-                s.exit_node,
+                if s.exit_node.is_empty() { "none" } else { &s.exit_node },
                 if req { "" } else { ", optional" }
             );
         }
@@ -715,11 +715,13 @@ fn cmd_list(cfg: &Config, show_pw: bool) -> Result<i32, String> {
             println!("    bootstrap   {b}");
         }
         if p.tailscale {
+            let exit_node = p
+                .exit_node
+                .clone()
+                .unwrap_or_else(|| cfg.settings.exit_node.clone());
             println!(
-                "    tailscale   required (exit: {})",
+                "    tailscale   required (exit node: {})",
-                p.exit_node
+                if exit_node.is_empty() { "none".to_string() } else { exit_node }
-                    .clone()
-                    .unwrap_or_else(|| cfg.settings.exit_node.clone())
             );
         }
         let mut order: Vec<String> = p.networks.clone();
@@ -804,7 +806,11 @@ fn cmd_doctor(
     );
     println!("  internet    {}", if s.internet { "ok" } else { "DOWN" });
     if let Some(h) = &s.tailscale {
-        println!("  tailscale   {} (exit {})", h.describe(), s.exit_node);
+        println!(
+            "  tailscale   {} (exit node: {})",
+            h.describe(),
+            if s.exit_node.is_empty() { "none" } else { &s.exit_node }
+        );
     }
 
     if let Some(iface) = &s.iface {