Add a live status line to the stats panel

Shows what's happening right now underneath the table (connecting,
resolving the friend, discovering targets, fetching channel history,
waiting out a jittered delay before reacting, sending a reaction,
removing a reaction during --undo, etc). Status updates are cheap
and DB-free, using the last fetched stats for re-rendering.

bot/display.py

@@ -1,18 +1,19 @@
 import asyncio
 from typing import List, Optional
 
-from rich.console import Console
+from rich.console import Console, Group
 from rich.live import Live
 from rich.panel import Panel
 from rich.progress_bar import ProgressBar
 from rich.table import Table
+from rich.text import Text
 
 from bot.storage import Storage
 
 _TYPE_LABELS = {"guild": "server", "group_dm": "group", "dm": "DM"}
 
 
-def _render(stats: List[dict], friend_label: Optional[str] = None) -> Panel:
+def _render(stats: List[dict], friend_label: Optional[str] = None, status: Optional[str] = None) -> Panel:
     table = Table(expand=True)
     table.add_column("Target")
     table.add_column("Type")
@@ -40,8 +41,12 @@ def _render(stats: List[dict], friend_label: Optional[str] = None) -> Panel:
     if not stats:
         table.add_row("(no targets discovered yet)", "-", "-", "-", "-")
 
+    content = table
+    if status:
+        content = Group(table, Text(f"▸ {status}", style="dim italic"))
+
     who = f" for {friend_label}" if friend_label else ""
-    return Panel(table, title=f"Reaction stats{who} — total: {total_reacted}/{total_found}", border_style="cyan")
+    return Panel(content, title=f"Reaction stats{who} — total: {total_reacted}/{total_found}", border_style="cyan")
 
 
 class StatsDisplay:
@@ -52,8 +57,10 @@ class StatsDisplay:
         self.console = console
         self.storage = storage
         self.friend_label: Optional[str] = None
+        self.status: str = "Starting..."
+        self._last_stats: List[dict] = []
         self._live = Live(
-            _render([]),
+            _render([], None, self.status),
             console=console,
             refresh_per_second=4,
             transient=False,
@@ -69,10 +76,16 @@ class StatsDisplay:
     def set_friend(self, label: str) -> None:
         self.friend_label = label
 
+    def set_status(self, text: str) -> None:
+        """Update the "what's happening right now" line without hitting the
+        DB — cheap enough to call for every jittered wait / API call."""
+        self.status = text
+        self._live.update(_render(self._last_stats, self.friend_label, self.status))
+
     def refresh_sync(self) -> None:
-        stats = self.storage.get_stats()
-        self._live.update(_render(stats, self.friend_label))
+        self._last_stats = self.storage.get_stats()
+        self._live.update(_render(self._last_stats, self.friend_label, self.status))
 
     async def refresh(self) -> None:
-        stats = await asyncio.to_thread(self.storage.get_stats)
-        self._live.update(_render(stats, self.friend_label))
+        self._last_stats = await asyncio.to_thread(self.storage.get_stats)
+        self._live.update(_render(self._last_stats, self.friend_label, self.status))