refactor: remove panic-prone unwrap and expect calls

vnt-ipc/build.rs

@@ -1,4 +1,4 @@
-fn main() {
+fn main() -> Result<(), Box<dyn std::error::Error>> {
     let mut config = prost_build::Config::new();
 
     match protoc_bin_vendored::protoc_bin_path() {
@@ -13,7 +13,6 @@ fn main() {
     }
 
     config.protoc_arg("--experimental_allow_proto3_optional");
-    config
-        .compile_protos(&["proto/local_ipc.proto"], &["proto"])
-        .unwrap();
+    config.compile_protos(&["proto/local_ipc.proto"], &["proto"])?;
+    Ok(())
 }

vnt-ipc/src/client.rs

@@ -285,5 +285,5 @@ pub fn ts_to_string(ts_secs: i64) -> String {
     };
     let dt_local = dt.to_offset(local_offset);
     let format = format_description!("[year]-[month]-[day] [hour]:[minute]:[second]");
-    dt_local.format(&format).unwrap()
+    dt_local.format(&format).unwrap_or_default()
 }