enhance(cli, query): update reasoning progress display (#368)

Improve the user experience when a model provides reasoning by showing
incremental progress. When using the `progress` display mode, the CLI
now prints "reasoning..." at the start and appends a dot for each
subsequent reasoning chunk received from the model.

This provides visual feedback that the model is still processing the
request during longer reasoning phases.

---------

Signed-off-by: Jean Mertz <[email protected]>

Author: JeanMertz

crates/jp_cli/src/cmd/query/event.rs

@@ -43,9 +43,15 @@ impl StreamEventHandler {
             ChatResponse::Reasoning { ref reasoning } if !reasoning.is_empty() => {
                 let mut display = match reasoning_display {
                     ReasoningDisplayConfig::Summary => todo!(),
-                    ReasoningDisplayConfig::Static if self.reasoning_tokens.is_empty() => {
-                        Some("_reasoning..._".to_owned())
+                    ReasoningDisplayConfig::Static | ReasoningDisplayConfig::Progress
+                        if self.reasoning_tokens.is_empty() =>
+                    {
+                        Some("reasoning...".to_owned())
                     }
+                    // For progress display, we start with `reasoning...` and then
+                    // append a dot for each new reasoning chunk, to indicate
+                    // that the reasoning is still ongoing.
+                    ReasoningDisplayConfig::Progress => Some(".".to_owned()),
                     ReasoningDisplayConfig::Full => Some(reasoning.clone()),
                     ReasoningDisplayConfig::Truncate(TruncateChars { characters }) => {
                         let remaining =

crates/jp_config/src/style/reasoning.rs

@@ -76,6 +76,10 @@ pub enum ReasoningDisplayConfig {
     /// reasoning.
     Static,
 
+    /// Similar to `Static`, but additional dots are added to indicate that the
+    /// assistant is still reasoning.
+    Progress,
+
     /// Reasoning content is displayed as it is generated.
     #[default]
     Full,