feat: replace synchronous HTTP calls with async client and add background task tracking

pr/ui/__init__.py

@@ -1,9 +1,10 @@
-from pr.ui.colors import Colors
+from pr.ui.colors import Colors, Spinner
 from pr.ui.display import display_tool_call, print_autonomous_header
 from pr.ui.rendering import highlight_code, render_markdown
 
 __all__ = [
     "Colors",
+    "Spinner",
     "highlight_code",
     "render_markdown",
     "display_tool_call",

pr/ui/colors.py

@@ -1,3 +1,6 @@
+import asyncio
+
+
 class Colors:
     RESET = "\033[0m"
     BOLD = "\033[1m"
@@ -12,3 +15,30 @@ class Colors:
     BG_BLUE = "\033[44m"
     BG_GREEN = "\033[42m"
     BG_RED = "\033[41m"
+
+
+class Spinner:
+    def __init__(self, message="Processing...", spinner_chars="|/-\\"):
+        self.message = message
+        self.spinner_chars = spinner_chars
+        self.running = False
+        self.task = None
+
+    async def start(self):
+        self.running = True
+        self.task = asyncio.create_task(self._spin())
+
+    async def stop(self):
+        self.running = False
+        if self.task:
+            await self.task
+        # Clear the line
+        print("\r" + " " * (len(self.message) + 2) + "\r", end="", flush=True)
+
+    async def _spin(self):
+        i = 0
+        while self.running:
+            char = self.spinner_chars[i % len(self.spinner_chars)]
+            print(f"\r{Colors.CYAN}{char}{Colors.RESET} {self.message}", end="", flush=True)
+            i += 1
+            await asyncio.sleep(0.1)