chore: satisfy CI fmt/clippy gates; make the release publish step idempotent

`cargo fmt --all -- --check` and `cargo clippy --all-targets -- -D warnings` are
CI gates and both were failing on this release's code.

- rustfmt across the files touched by the release
- `.split('/').last()` walks the whole iterator on a DoubleEndedIterator; use
  `.next_back()` (4 sites in the setup/featured + delete handlers)
- `set_progress` had two identical branches; the intent is "take the first
  reading, then only move forward", which is one condition

release.yml published unconditionally on a version tag, so a version already on
crates.io (released by hand, or a re-run of the job) failed the workflow — a
version can never be re-uploaded. It now checks the registry and skips instead.

src/main.rs

@@ -90,7 +90,10 @@ fn should_open_browser(args: &Args) -> bool {
     if args.no_browser {
         return false;
     }
-    if std::env::var("CORTIQ_NO_BROWSER").map(|v| !v.is_empty() && v != "0").unwrap_or(false) {
+    if std::env::var("CORTIQ_NO_BROWSER")
+        .map(|v| !v.is_empty() && v != "0")
+        .unwrap_or(false)
+    {
         return false;
     }
     if std::env::var("CI").is_ok() || std::env::var("NO_BROWSER").is_ok() {
@@ -121,7 +124,9 @@ fn is_port_free(host: &str, port: u16) -> bool {
     let probe_host = if host == "0.0.0.0" { "127.0.0.1" } else { host };
     if let Ok(mut addrs) = (probe_host, port).to_socket_addrs() {
         if let Some(a) = addrs.next() {
-            if std::net::TcpStream::connect_timeout(&a, std::time::Duration::from_millis(200)).is_ok() {
+            if std::net::TcpStream::connect_timeout(&a, std::time::Duration::from_millis(200))
+                .is_ok()
+            {
                 return false;
             }
         }
@@ -134,7 +139,11 @@ fn resolve_listen(cfg: &mut Config, no_search: bool) -> String {
         return cfg.listen.clone();
     }
     let (host, port) = parse_listen(&cfg.listen);
-    let clean_host = if host.is_empty() { "0.0.0.0".to_string() } else { host };
+    let clean_host = if host.is_empty() {
+        "0.0.0.0".to_string()
+    } else {
+        host
+    };
     if is_port_free(&clean_host, port) {
         return cfg.listen.clone();
     }
@@ -147,7 +156,9 @@ fn resolve_listen(cfg: &mut Config, no_search: bool) -> String {
         }
     }
     if !is_port_free(&clean_host, port) {
-        eprintln!("warning: port {port} busy and no free port found in next 50, will try to bind anyway");
+        eprintln!(
+            "warning: port {port} busy and no free port found in next 50, will try to bind anyway"
+        );
     }
     cfg.listen.clone()
 }
@@ -244,7 +255,11 @@ async fn main() -> anyhow::Result<()> {
             listen.clone()
         };
         // On first run open the onboarding wizard, otherwise the normal console.
-        let admin_path = if first_run { "/admin#/onboarding" } else { "/admin" };
+        let admin_path = if first_run {
+            "/admin#/onboarding"
+        } else {
+            "/admin"
+        };
         let url = if admin_token.is_empty() {
             format!("http://{host_for_url}{admin_path}")
         } else {