feat: Problems API, ingest hook, and UI

backend/app/api/v1/problems.py

@@ -0,0 +1,99 @@
+from datetime import datetime
+
+from fastapi import APIRouter, Depends, HTTPException, Query
+from pydantic import BaseModel
+from sqlalchemy import func, select
+from sqlalchemy.orm import Session, joinedload
+
+from app.auth.jwt_auth import get_current_user
+from app.database import get_db
+from app.models import Problem
+
+router = APIRouter(prefix="/problems", tags=["problems"])
+
+
+class ProblemSummary(BaseModel):
+    id: int
+    host_id: int | None
+    hostname: str | None
+    title: str
+    summary: str
+    severity: str
+    status: str
+    rule_id: str | None
+    created_at: datetime
+    updated_at: datetime
+
+    model_config = {"from_attributes": True}
+
+
+class ProblemListResponse(BaseModel):
+    items: list[ProblemSummary]
+    total: int
+    page: int
+    page_size: int
+
+
+@router.get("", response_model=ProblemListResponse)
+def list_problems(
+    page: int = Query(1, ge=1),
+    page_size: int = Query(50, ge=1, le=200),
+    status: str | None = Query(None),
+    db: Session = Depends(get_db),
+    _user: str = Depends(get_current_user),
+) -> ProblemListResponse:
+    stmt = select(Problem).options(joinedload(Problem.host))
+    count_stmt = select(func.count()).select_from(Problem)
+    if status:
+        stmt = stmt.where(Problem.status == status)
+        count_stmt = count_stmt.where(Problem.status == status)
+
+    total = db.scalar(count_stmt) or 0
+    rows = db.scalars(
+        stmt.order_by(Problem.updated_at.desc()).offset((page - 1) * page_size).limit(page_size)
+    ).all()
+
+    items = [
+        ProblemSummary(
+            id=p.id,
+            host_id=p.host_id,
+            hostname=p.host.hostname if p.host else None,
+            title=p.title,
+            summary=p.summary,
+            severity=p.severity,
+            status=p.status,
+            rule_id=p.rule_id,
+            created_at=p.created_at,
+            updated_at=p.updated_at,
+        )
+        for p in rows
+    ]
+    return ProblemListResponse(items=items, total=total, page=page, page_size=page_size)
+
+
+@router.post("/{problem_id}/ack")
+def ack_problem(
+    problem_id: int,
+    db: Session = Depends(get_db),
+    _user: str = Depends(get_current_user),
+) -> dict:
+    problem = db.get(Problem, problem_id)
+    if problem is None:
+        raise HTTPException(status_code=404, detail="Problem not found")
+    problem.status = "acknowledged"
+    db.commit()
+    return {"id": problem.id, "status": problem.status}
+
+
+@router.post("/{problem_id}/resolve")
+def resolve_problem(
+    problem_id: int,
+    db: Session = Depends(get_db),
+    _user: str = Depends(get_current_user),
+) -> dict:
+    problem = db.get(Problem, problem_id)
+    if problem is None:
+        raise HTTPException(status_code=404, detail="Problem not found")
+    problem.status = "resolved"
+    db.commit()
+    return {"id": problem.id, "status": problem.status}