feat: host inventory (agent.inventory), host detail page, UI columns

Store hardware/software snapshots on hosts; warn on hardware changes. Host card from Hosts list. Add agent version column to Events/Overview; rename Hosts table columns and sort by status.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/app/services/telegram_templates.py

@@ -333,6 +333,50 @@ def format_smb_admin_share_html(event: Event) -> str:
     return msg.rstrip()
 
 
+def _format_inventory_change_line(change: dict[str, Any]) -> str:
+    field = html_escape(str(change.get("field") or "?"))
+    old = change.get("old")
+    new = change.get("new")
+    return f"• <b>{field}</b>: {html_escape(old)} → {html_escape(new)}"
+
+
+def format_agent_inventory_html(event: Event) -> str:
+    details = _details_dict(event)
+    changes = details.get("hardware_changes")
+    if isinstance(changes, list) and changes:
+        msg = "<b>⚠️ Изменилось железо хоста</b>\n"
+        msg += _line("🏢", "Хост", host_label(event.host))
+        msg += _line("🕐", "Время", format_time(event.occurred_at))
+        msg += "\n"
+        for item in changes:
+            if isinstance(item, dict):
+                msg += _format_inventory_change_line(item) + "\n"
+        if event.summary:
+            msg += f"\n{html_escape(event.summary)}"
+        return msg.rstrip()
+
+    inv = details.get("inventory")
+    if not isinstance(inv, dict):
+        inv = {}
+    msg = "<b>🖥️ Инвентаризация хоста</b>\n"
+    msg += _line("🏢", "Хост", host_label(event.host))
+    windows = inv.get("windows") if isinstance(inv.get("windows"), dict) else {}
+    os_name = windows.get("product_name") or event.host.os_version if event.host else None
+    if os_name:
+        msg += _line("💿", "ОС", html_escape(os_name))
+    mem = inv.get("memory_gb")
+    if mem is not None:
+        msg += _line("🧠", "RAM", f"{html_escape(mem)} GB")
+    procs = inv.get("processor")
+    if isinstance(procs, list) and procs:
+        names = [str(p.get("name") or "").strip() for p in procs if isinstance(p, dict)]
+        names = [n for n in names if n]
+        if names:
+            msg += _line("⚙️", "CPU", html_escape("; ".join(names)))
+    msg += _line("🕐", "Время", format_time(event.occurred_at))
+    return msg.rstrip()
+
+
 def format_generic_event_html(event: Event) -> str:
     sev = event.severity.upper()
     msg = f"<b>🚨 SAC: {html_escape(event.title)}</b>\n"
@@ -453,6 +497,8 @@ def _format_event_body_html(event: Event) -> str:
         return format_winrm_session_html(event)
     if event.type.startswith("smb."):
         return format_smb_admin_share_html(event)
+    if event.type == "agent.inventory":
+        return format_agent_inventory_html(event)
     return format_generic_event_html(event)