feat: add built-in subquery tool with hierarchical query ids

* Add config options subquery and subquery_max_depth.
* Register an internal subquery function that spawns a fresh LLM query
with the current model configuration but without the full context.
The model selects context numerically (message_indexes) or by text
excerpt (excerpts).
* Subqueries can use tools, including further nested subqueries up to
subquery_max_depth.
* Queries and subqueries get hierarchical ids ([0], [0/1], [0/1/2])
that prefix tool-call prints and spinner messages.

1 files changed, 8 insertions, 2 deletions

diff --git a/src/render/stream.rs b/src/render/stream.rs
index d6cadde..af69176 100644
--- a/src/render/stream.rs
+++ b/src/render/stream.rs
@@ -36,7 +36,10 @@ pub async fn raw_stream(
     mut rx: UnboundedReceiver<SseEvent>,
     abort_signal: &AbortSignal,
 ) -> Result<()> {
-    let mut spinner = Some(spawn_spinner("Generating"));
+    let mut spinner = Some(spawn_spinner(&match crate::utils::current_query_scope() {
+        Some(scope) => format!("{scope} Generating"),
+        None => "Generating".to_string(),
+    }));
 
     loop {
         if abort_signal.aborted() {
@@ -75,7 +78,10 @@ async fn markdown_stream_inner(
 
     let columns = terminal::size()?.0;
 
-    let mut spinner = Some(spawn_spinner("Generating"));
+    let mut spinner = Some(spawn_spinner(&match crate::utils::current_query_scope() {
+        Some(scope) => format!("{scope} Generating"),
+        None => "Generating".to_string(),
+    }));
 
     'outer: loop {
         if abort_signal.aborted() {