Add image paste support for xterm.js terminal

Intercept clipboard paste events containing images in the terminal,
upload them into the Docker container via bollard's tar upload API,
and inject the resulting file path into terminal stdin so Claude Code
can reference the image.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/src-tauri/src/commands/terminal_commands.rs

@@ -72,3 +72,23 @@ pub async fn close_terminal_session(
     state.exec_manager.close_session(&session_id).await;
     Ok(())
 }
+
+#[tauri::command]
+pub async fn paste_image_to_terminal(
+    session_id: String,
+    image_data: Vec<u8>,
+    state: State<'_, AppState>,
+) -> Result<String, String> {
+    let container_id = state.exec_manager.get_container_id(&session_id).await?;
+
+    let timestamp = std::time::SystemTime::now()
+        .duration_since(std::time::UNIX_EPOCH)
+        .unwrap_or_default()
+        .as_millis();
+    let file_name = format!("clipboard_{}.png", timestamp);
+
+    state
+        .exec_manager
+        .write_file_to_container(&container_id, &file_name, &image_data)
+        .await
+}