config: make all fields and the file optional; add output format; default logLevel to warnHEADmain

- timezone optional -> host system zone (jiff, macOS + Linux)
- storagePath optional -> platform data dir (/var/lib on Linux, ~/Library/Application Support on macOS)
- config file optional at the default path; explicit --config must still exist
- default logLevel changed from info to warn
- new output field (text|json) sets the default rendering so -j isn't needed per call

1 files changed, 2 insertions, 0 deletions

diff --git a/src/output.rs b/src/output.rs
index 0a8a536..177e0f4 100644
--- a/src/output.rs
+++ b/src/output.rs
@@ -80,6 +80,7 @@ pub struct ConfigReport {
     pub timezone: String,
     pub log_level: String,
     pub fabric_label: String,
+    pub output: String,
 }
 
 #[derive(Debug, Serialize)]
@@ -246,6 +247,7 @@ fn render_status(report: &StatusReport) {
     println!("  timezone:           {}", report.config.timezone);
     println!("  logLevel:           {}", report.config.log_level);
     println!("  fabricLabel:        {}", report.config.fabric_label);
+    println!("  output:             {}", report.config.output);
     println!(
         "Controller storage:   {}",
         if report.storage_initialized {