feat(backend): modèle unifié streaming/progress/events provider-agnostic + pont app-tauri — foundation #156 (QA verte)

crates/app-tauri/src/chat.rs

@@ -30,7 +30,9 @@ use backend::stream::ReplayOutputBridge;
 use tauri::ipc::Channel;
 
 use domain::ids::SessionId;
-use domain::ports::ReplyEvent;
+use domain::ports::{
+    ReplyEvent, ReplyProgress, ReplyProgressKind, ReplyProgressSource, ReplyProgressStage,
+};
 
 use crate::dto::ReplyChunk;
 use crate::stream::TauriChannelSink;
@@ -136,6 +138,13 @@ fn reply_chunk_bytes(chunk: &ReplyChunk) -> usize {
         ReplyChunk::UserPrompt { text } => text.len(),
         ReplyChunk::TextDelta { text } => text.len(),
         ReplyChunk::ToolActivity { label } => label.len(),
+        ReplyChunk::Progress { progress } => {
+            progress.label.len()
+                + progress.text.as_ref().map_or(0, String::len)
+                + progress.provider.as_ref().map_or(0, String::len)
+                + progress.native_event.as_ref().map_or(0, String::len)
+                + progress.tool_name.as_ref().map_or(0, String::len)
+        }
         ReplyChunk::Final { content } => content.len(),
         ReplyChunk::Error { message } => message.len(),
     }
@@ -154,8 +163,20 @@ fn reply_chunk_bytes(chunk: &ReplyChunk) -> usize {
 #[must_use]
 pub fn chunk_from_event(event: ReplyEvent) -> Option<ReplyChunk> {
     match event {
+        ReplyEvent::Progress { progress } => Some(ReplyChunk::Progress {
+            progress: progress.into(),
+        }),
         ReplyEvent::TextDelta { text } => Some(ReplyChunk::TextDelta { text }),
-        ReplyEvent::ToolActivity { label } => Some(ReplyChunk::ToolActivity { label }),
+        ReplyEvent::ToolActivity { label } => Some(ReplyChunk::Progress {
+            progress: ReplyProgress::new(
+                ReplyProgressSource::ProviderNative,
+                ReplyProgressKind::Tool,
+                ReplyProgressStage::Info,
+                label.clone(),
+            )
+            .with_tool_name(label)
+            .into(),
+        }),
         ReplyEvent::Error { message } => Some(ReplyChunk::Error { message }),
         ReplyEvent::Final { content } => {
             if content.trim().is_empty() {
@@ -166,7 +187,16 @@ pub fn chunk_from_event(event: ReplyEvent) -> Option<ReplyChunk> {
                 Some(ReplyChunk::Final { content })
             }
         }
-        ReplyEvent::Announcement { .. } => None,
+        ReplyEvent::Announcement { text } => Some(ReplyChunk::Progress {
+            progress: ReplyProgress::new(
+                ReplyProgressSource::ProviderNative,
+                ReplyProgressKind::Message,
+                ReplyProgressStage::Delta,
+                "message intermédiaire",
+            )
+            .with_text(text)
+            .into(),
+        }),
         ReplyEvent::Heartbeat => None,
         ReplyEvent::RateLimited { .. } => None,
     }

crates/app-tauri/src/commands.rs

@@ -2195,14 +2195,32 @@ pub async fn agent_send(
         },
     );
 
+    // Open the turn stream with a live progress tap. The returned `ReplyStream`
+    // remains the authoritative drain to `Final`; the tap is best-effort
+    // observability for provider-native/local progress produced while `send` is
+    // still running.
+    let (tap_tx, tap_rx) = std::sync::mpsc::channel();
+    let tap_bridge = std::sync::Arc::clone(&state.chat_bridge);
+    let tap_sid = sid;
+    let tap_pump = std::thread::spawn(move || {
+        for event in tap_rx {
+            let Some(chunk) = crate::chat::chunk_from_event(event) else {
+                continue;
+            };
+            if matches!(chunk, ReplyChunk::Final { .. } | ReplyChunk::Error { .. }) {
+                continue;
+            }
+            let _ = tap_bridge.send_output(&tap_sid, chunk);
+        }
+    });
+
     // Open the turn stream. A start failure leaves the just-registered channel in
     // place (the cell stays attached, ready for a retry) — mirrors the PTY pump,
     // which only unregisters on a hard subscribe failure; here the session is
     // still live, so we keep the attach and surface the error.
-    let stream = session
-        .send(&prompt_for_model)
-        .await
-        .map_err(|e| ErrorDto::from(AppError::from(e)))?;
+    let stream_result = session.send_with_tap(&prompt_for_model, tap_tx).await;
+    let _ = tap_pump.join();
+    let stream = stream_result.map_err(|e| ErrorDto::from(AppError::from(e)))?;
 
     // Drain the blocking reply iterator on a dedicated OS thread (the stream is a
     // synchronous `Iterator`, exactly like the PTY byte stream). It runs to the