Add HeXi bot codebase: custom plugins, web frontends, tests

- hexi core: message handling, rate limiting, cooldown, plugin manager
- Custom plugins: BF stats, daily check-in, quotes, persona cards, etc.
- Community plugins vendored under hexi/plugins with local fixes
- Web admin frontends (learning-chat, persona-admin), unified hexi/web
- Tests for rate_limit/cooldown/memes/persona; poetry.lock

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

hexi/plugins/nonebot_plugin_picstatus/collectors/cpu.py

@@ -0,0 +1,70 @@
+import asyncio
+from dataclasses import dataclass
+from typing import cast
+
+import psutil
+from cpuinfo import get_cpu_info
+from nonebot import logger
+
+from . import first_time_collector, normal_collector, periodic_collector
+
+
+@dataclass
+class CpuFreq:
+    current: float | None
+    min: float | None  # noqa: A003
+    max: float | None  # noqa: A003
+
+
+@first_time_collector()
+async def cpu_brand() -> str:
+    try:
+        brand = (
+            cast("str", get_cpu_info().get("brand_raw", ""))
+            .split("@", maxsplit=1)[0]
+            .strip()
+        )
+        if brand.lower().endswith(("cpu", "processor")):
+            brand = brand.rsplit(maxsplit=1)[0].strip()
+    except Exception:
+        logger.exception("Error when getting CPU brand")
+        return "未知型号"
+    else:
+        return brand
+
+
+@first_time_collector()
+async def cpu_count_logical() -> int | None:
+    return psutil.cpu_count()
+
+
+@first_time_collector()
+async def cpu_count() -> int | None:
+    return psutil.cpu_count(logical=False)
+
+
+async def get_cpu_percent() -> float:
+    """实时采样 0.5s,避免 psutil 首次调用返回 0.0"""
+    return await asyncio.to_thread(psutil.cpu_percent, 0.5)
+
+
+async def get_cpu_percent_periodic() -> float:
+    """周期采样:两次调用之间的间隔即为采样区间,直接取瞬时差值即可"""
+    return psutil.cpu_percent()
+
+
+normal_collector("cpu_percent")(get_cpu_percent)
+periodic_collector("cpu_percent_periodic")(get_cpu_percent_periodic)
+
+
+async def get_cpu_freq() -> CpuFreq:
+    cpu_freq = psutil.cpu_freq()
+    return CpuFreq(
+        current=getattr(cpu_freq, "current", None),
+        min=getattr(cpu_freq, "min", None),
+        max=getattr(cpu_freq, "max", None),
+    )
+
+
+normal_collector("cpu_freq")(get_cpu_freq)
+periodic_collector("cpu_freq_periodic")(get_cpu_freq)