feat: metrics summary panel for overview pane

bin/metrics.py

@@ -0,0 +1,61 @@
+"""Compact metrics panel for overview pane right side.
+Run: watch -n10 python3 bin/metrics.py
+"""
+import os
+import sys
+from datetime import datetime, timezone
+
+sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
+from log_append import read_entries
+
+from rich.console import Console
+from rich.panel import Panel
+from rich.text import Text
+
+console = Console(width=38)
+
+
+def summarize(entries: list) -> tuple:
+    today = datetime.now(timezone.utc).date().isoformat()
+    today_entries = [e for e in entries if (e.get('ts') or '').startswith(today)]
+    total = len(today_entries)
+    kept = sum(1 for e in today_entries if e.get('kept'))
+    projects: dict = {}
+    for e in today_entries:
+        p = e.get('project') or 'unknown'
+        projects.setdefault(p, {'total': 0, 'kept': 0})
+        projects[p]['total'] += 1
+        if e.get('kept'):
+            projects[p]['kept'] += 1
+    return total, kept, projects
+
+
+def render() -> None:
+    entries = read_entries()
+    total, kept, projects = summarize(entries)
+    rate = f"{kept / total * 100:.0f}%" if total else "—"
+
+    text = Text()
+    text.append(f"Today:  {total} experiments\n", style="bold")
+    text.append(f"Kept:   {kept}", style="green bold")
+    text.append(f"  ({rate})\n\n", style="dim")
+
+    if projects:
+        text.append("Per project:\n", style="bold dim")
+        for p, s in sorted(projects.items()):
+            r = f"{s['kept']}/{s['total']}"
+            bar = "█" * s['kept'] + "░" * (s['total'] - s['kept'])
+            text.append(f"  {p[:14]:<14} {r:>5}  {bar[:8]}\n")
+    else:
+        text.append("No experiments today.", style="dim italic")
+
+    console.print(Panel(
+        text,
+        title="[bold #DA251C]Metrics[/bold #DA251C]",
+        border_style="#FFD802",
+        expand=False,
+    ))
+
+
+if __name__ == '__main__':
+    render()