fix(jira): expose non-admin jira-config, drop security-test label; catalog paging

GET /system/jira-config was admin-only, so non-admin users hit a 403
and the frontend silently fell back to a hardcoded jira.atlassian.com
base URL when building /browse/{key} links. Opened it to any
authenticated user (still no secrets returned).

Also drops the redundant 'security-test' Jira label, and adds a
page-size selector (10/25/50/100) and a 'no existing test yet' filter
to the Test Catalog.

backend/app/routers/system.py

@@ -17,7 +17,7 @@ from pydantic import BaseModel
 from sqlalchemy.orm import Session
 
 from app.database import SessionLocal, get_db
-from app.dependencies.auth import require_role
+from app.dependencies.auth import require_role, get_current_user
 from app.models.user import User
 from app.services.mitre_sync_service import sync_mitre
 from app.services.intel_service import scan_intel
@@ -285,11 +285,13 @@ _JIRA_KEYS = {
 @router.get("/jira-config", response_model=JiraConfigOut)
 def get_jira_config(
     db: Session = Depends(get_db),
-    current_user: User = Depends(require_role("admin")),
+    current_user: User = Depends(get_current_user),
 ):
     """Return current Jira configuration (merged DB + env).
 
-    **Requires** the ``admin`` role. Credential values are never returned.
+    Open to any authenticated user — the frontend needs ``url`` to build
+    correct ``/browse/{key}`` links for non-admin users too. Credential
+    values (tokens, admin email) are never returned, only booleans.
     """
     from app.services.jira_service import (
         get_jira_url, get_jira_project_key, is_jira_enabled,