プロジェクト横断のタスク一覧と日別集計グラフを追加

左ペインに「すべてのプロジェクト」を追加し、全プロジェクトのタスクを1つの
一覧で扱えるようにした。あわせて右ペインに日別集計タブを設けた。

- /api/all: 全プロジェクトのタスクを開始日時順に返す (CSVはプロジェクト列付き)
- /api/daily: ターンをローカル日付で集計し、活動のない日も0で埋めて返す
  (プロジェクト別の内訳・期間指定 days= / 全期間・横持ちCSV)
- 日別集計タブ: 作業時間の棒グラフ (横断時はプロジェクト別の積み上げ、
  上位7件+その他)、14/30/90日・全期間の切替、日別テーブル、SVG手書きで
  外部ライブラリなし
- 再読込で横断モードの選択が先頭プロジェクトに戻る問題を修正
  (未選択と横断モードを state.project の undefined / null で区別)

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

chktime.py

@@ -22,7 +22,7 @@ import os
 import re
 import threading
 import webbrowser
-from datetime import datetime, timezone
+from datetime import datetime, timedelta, timezone
 from http.server import BaseHTTPRequestHandler, ThreadingHTTPServer
 from pathlib import Path
 from urllib.parse import parse_qs, urlparse
@@ -389,6 +389,113 @@ class Store:
                 return self.session(path)
         raise FileNotFoundError(session_id)
 
+    def all_sessions(self):
+        """全プロジェクトのタスクを1つのリストにまとめる (開始が新しい順)。"""
+        out = []
+        for project in self.projects():
+            for path in self.session_files(project["id"]):
+                summary = summary_of(self.session(path))
+                summary["project"] = project["id"]
+                summary["projectPath"] = summary.get("cwd") or project["path"]
+                out.append(summary)
+        out.sort(key=lambda s: s["startEpoch"] or 0, reverse=True)
+        return out
+
+    def daily_stats(self, project_id=None, days=30):
+        """ターンをローカル日付で集計する。project_id=None なら全プロジェクト。
+
+        days>0 なら「今日から遡って days 日」、それ以外は全期間。
+        活動のない日も 0 の行として埋めるので、そのまま横軸に使える。
+        """
+        paths = {p["id"]: p["path"] for p in self.projects()}
+        if project_id:
+            if project_id not in paths:
+                raise FileNotFoundError(project_id)
+            targets = [project_id]
+        else:
+            targets = list(paths)
+
+        today = datetime.now().date()
+        cutoff = today - timedelta(days=days - 1) if days and days > 0 else None
+
+        per_day = {}
+        per_project = {}
+        seen = set()
+        for pid in targets:
+            for path in self.session_files(pid):
+                session = self.session(path)
+                for turn in session["turns"]:
+                    if turn["ts"] is None:
+                        continue
+                    day = datetime.fromtimestamp(turn["ts"]).date()
+                    if cutoff and day < cutoff:
+                        continue
+                    dur = turn["durMs"] or 0
+                    counted = 1 if turn["kind"] in ("prompt", "command") else 0
+                    bucket = per_day.setdefault(day, {"activeMs": 0, "turns": 0, "sessions": set(), "byProject": {}})
+                    bucket["activeMs"] += dur
+                    bucket["turns"] += counted
+                    bucket["sessions"].add(session["id"])
+                    bucket["byProject"][pid] = bucket["byProject"].get(pid, 0) + dur
+                    total = per_project.setdefault(pid, {"activeMs": 0, "turns": 0, "sessions": set()})
+                    total["activeMs"] += dur
+                    total["turns"] += counted
+                    total["sessions"].add(session["id"])
+                    seen.add(session["id"])
+
+        if per_day:
+            start = cutoff or min(per_day)
+            end = max(max(per_day), today)
+        elif cutoff:
+            start, end = cutoff, today  # データなしでも指定範囲は 0 で埋める
+        else:
+            start = end = None
+
+        rows = []
+        cur = start
+        while cur and cur <= end:
+            bucket = per_day.get(cur)
+            rows.append(
+                {
+                    "date": cur.isoformat(),
+                    "dow": cur.weekday(),
+                    "activeMs": bucket["activeMs"] if bucket else 0,
+                    "turns": bucket["turns"] if bucket else 0,
+                    "sessions": len(bucket["sessions"]) if bucket else 0,
+                    "byProject": bucket["byProject"] if bucket else {},
+                }
+            )
+            cur += timedelta(days=1)
+
+        projects = sorted(
+            (
+                {
+                    "id": pid,
+                    "path": paths.get(pid, pid),
+                    "activeMs": v["activeMs"],
+                    "turns": v["turns"],
+                    "sessions": len(v["sessions"]),
+                }
+                for pid, v in per_project.items()
+            ),
+            key=lambda p: -p["activeMs"],
+        )
+        busiest = max(rows, key=lambda r: r["activeMs"], default=None)
+        return {
+            "scope": project_id or "",
+            "rangeDays": days if days and days > 0 else 0,
+            "days": rows,
+            "projects": projects,
+            "totals": {
+                "activeMs": sum(r["activeMs"] for r in rows),
+                "turns": sum(r["turns"] for r in rows),
+                "sessions": len(seen),
+                "activeDays": sum(1 for r in rows if r["activeMs"] or r["turns"]),
+                "busiestDate": busiest["date"] if busiest and busiest["activeMs"] else None,
+                "busiestMs": busiest["activeMs"] if busiest else 0,
+            },
+        }
+
     def clear(self):
         with self._lock:
             self._cache.clear()
@@ -433,14 +540,39 @@ def fmt_dur(msec):
     return f"{hours}h{minutes:02d}m"
 
 
-def sessions_csv(sessions):
+def parse_days(value):
+    """?days= の解釈。'all' / 0 / 不正値は全期間 (0) とみなす。"""
+    try:
+        days = int(value)
+    except (TypeError, ValueError):
+        return 0
+    return max(0, min(days, 3650))
+
+
+def sessions_csv(sessions, with_project=False):
     buf = io.StringIO(newline="")
     writer = csv.writer(buf)
-    writer.writerow(["session_id", "title", "start", "end", "wall", "active", "turns", "assistant_msgs", "tool_calls", "branch"])
+    head = ["session_id", "title", "start", "end", "wall", "active", "turns", "assistant_msgs", "tool_calls", "branch"]
+    writer.writerow((["project"] if with_project else []) + head)
     for s in sessions:
         writer.writerow(
-            [s["id"], s["title"], s["start"] or "", s["end"] or "", fmt_dur(s["wallMs"]),
-             fmt_dur(s["activeMs"]), s["turnCount"], s["assistantMsgs"], s["toolCalls"], s.get("gitBranch") or ""]
+            ([s.get("projectPath") or s.get("project") or ""] if with_project else [])
+            + [s["id"], s["title"], s["start"] or "", s["end"] or "", fmt_dur(s["wallMs"]),
+               fmt_dur(s["activeMs"]), s["turnCount"], s["assistantMsgs"], s["toolCalls"], s.get("gitBranch") or ""]
+        )
+    return buf.getvalue()
+
+
+def daily_csv(data):
+    buf = io.StringIO(newline="")
+    writer = csv.writer(buf)
+    projects = data["projects"]
+    writer.writerow(["date", "dow", "active", "active_ms", "turns", "sessions"] + [p["path"] for p in projects])
+    labels = "月火水木金土日"
+    for row in data["days"]:
+        writer.writerow(
+            [row["date"], labels[row["dow"]], fmt_dur(row["activeMs"]), row["activeMs"], row["turns"], row["sessions"]]
+            + [fmt_dur(row["byProject"].get(p["id"])) for p in projects]
         )
     return buf.getvalue()
 
@@ -494,6 +626,17 @@ class Handler(BaseHTTPRequestHandler):
             if query.get("format", [""])[0] == "csv":
                 return self.send_text(sessions_csv(sessions), "text/csv", f"{project}-sessions.csv")
             return self.send_json({"project": project, "sessions": sessions})
+        if route == "/api/all":
+            sessions = store.all_sessions()
+            if query.get("format", [""])[0] == "csv":
+                return self.send_text(sessions_csv(sessions, True), "text/csv", "all-sessions.csv")
+            return self.send_json({"project": "", "sessions": sessions})
+        if route == "/api/daily":
+            project = query.get("project", [""])[0]
+            data = store.daily_stats(project or None, parse_days(query.get("days", ["30"])[0]))
+            if query.get("format", [""])[0] == "csv":
+                return self.send_text(daily_csv(data), "text/csv", f"{project or 'all'}-daily.csv")
+            return self.send_json(data)
         if route == "/api/session":
             project = query.get("project", [""])[0]
             session_id = query.get("id", [""])[0]