feat(stats): optimize dashboard data loading with internal ui endpoints

app/api/stats.py

@@ -2,79 +2,23 @@ from __future__ import annotations
 
 from pathlib import Path
 
-from fastapi import APIRouter, Depends, Request
+from fastapi import APIRouter, Request
 from fastapi.responses import HTMLResponse
 from fastapi.templating import Jinja2Templates
 
-from app.api.tasks import get_task_repository
-from app.storage import JsonFileTaskRepository, StoredTask
-
-
 router = APIRouter(tags=["stats"])
 
 templates = Jinja2Templates(directory=str(Path(__file__).resolve().parents[2] / "templates"))
 
 
-def get_task_status(task: StoredTask) -> str:
-    if task.done_at is not None:
-        return "done"
-    if task.started_at is not None:
-        return "in_progress"
-    return "backlog"
-
-
-def format_dt(value: object) -> str:
-    if value is None:
-        return "—"
-    return str(value)
-
-
-def format_duration(task: StoredTask) -> str:
-    if task.started_at is None or task.done_at is None:
-        return "—"
-
-    delta = task.done_at - task.started_at
-    total_seconds = int(delta.total_seconds())
-    hours, remainder = divmod(total_seconds, 3600)
-    minutes, seconds = divmod(remainder, 60)
-    return f"{hours}h {minutes}m {seconds}s"
-
-
-def serialize_task(task: StoredTask) -> dict[str, str]:
-    return {
-        "id": str(task.id),
-        "title": task.title,
-        "status": get_task_status(task),
-        "created_at": task.created_at.isoformat(),
-        "started_at": task.started_at.isoformat() if task.started_at is not None else "",
-        "done_at": task.done_at.isoformat() if task.done_at is not None else "",
-        "cycle_time": format_duration(task),
-    }
-
-
 @router.get("/stats", response_class=HTMLResponse)
 def stats_page(
     request: Request,
-    repo: JsonFileTaskRepository = Depends(get_task_repository),
 ) -> HTMLResponse:
-    tasks = repo.list_tasks()
-
-    backlog_tasks = [serialize_task(task) for task in tasks if get_task_status(task) == "backlog"]
-    in_progress_tasks = [serialize_task(task) for task in tasks if get_task_status(task) == "in_progress"]
-    done_tasks = [serialize_task(task) for task in tasks if get_task_status(task) == "done"]
-
-    selected_task = None
-    if tasks:
-        selected_task = serialize_task(tasks[0])
-
     return templates.TemplateResponse(
         request=request,
         name="stats.html",
         context={
-            "selected_task": selected_task,
-            "backlog_tasks": backlog_tasks,
-            "in_progress_tasks": in_progress_tasks,
-            "done_tasks": done_tasks,
+            "selected_task": None,
         },
     )
-