feat(templates,campaigns): validate MITRE technique IDs, surface template suggestions first, manager can re-approve rejected campaigns

- TestTemplate/TemplateSuggestion creation and updates now reject any
  mitre_technique_id that doesn't match a real, already-synced MITRE
  ATT&CK technique. Frontend swaps the free-text ID input for a
  technique picker.
- Test Catalog now shows pending template suggestions before the
  catalog grid, with full field detail (platform, severity, tool,
  atomic ID, source URL, remediation) instead of just name/procedure.
- A manager can edit and directly re-approve a campaign they previously
  rejected, instead of needing the original lead to resubmit it.

backend/app/services/campaign_crud_service.py

@@ -367,6 +367,11 @@ def approve_campaign(
 ) -> Campaign:
     """Approve a pending campaign: fix its start date and activate it.
 
+    Also allows approving a previously-rejected campaign directly (status
+    ``draft`` with a ``rejection_reason`` set) — a manager can edit it via
+    ``update_campaign()`` and then approve it themselves, without needing
+    the original lead to resubmit it through the normal queue.
+
     Raises EntityNotFoundError, BusinessRuleViolation.
     Does not commit; caller commits.
     """
@@ -374,8 +379,9 @@ def approve_campaign(
     if not campaign:
         raise EntityNotFoundError("Campaign", campaign_id)
 
-    if campaign.status != "pending_approval":
-        raise BusinessRuleViolation("Only campaigns pending approval can be approved")
+    is_previously_rejected_draft = campaign.status == "draft" and campaign.rejection_reason
+    if campaign.status != "pending_approval" and not is_previously_rejected_draft:
+        raise BusinessRuleViolation("Only campaigns pending approval (or previously rejected) can be approved")
 
     if not start_date:
         raise BusinessRuleViolation("start_date is required to approve a campaign")
@@ -454,7 +460,7 @@ def update_campaign(
     Does not commit; caller commits.
     """
     # Assign campaign = db.query(Campaign).filter(Campaign.id == campaign_id).first()
-    campaign = db.query(Campaign).filter(Campaign.id == campaign_id).first()
+    campaign = db.query(Campaign).filter(Campaign.id == uuid.UUID(campaign_id)).first()
     # Check: not campaign
     if not campaign:
         # Raise EntityNotFoundError
@@ -465,10 +471,16 @@ def update_campaign(
         # Raise BusinessRuleViolation
         raise BusinessRuleViolation("Can only update draft or active campaigns")
 
-    # Check: str(campaign.created_by) != str(updater_id) and updater_role != "ad...
-    if str(campaign.created_by) != str(updater_id) and updater_role != "admin":
+    # A manager may edit a campaign they (or another manager) previously
+    # rejected — this is what lets them fix it up and self-approve it,
+    # instead of bouncing it back to the original lead to resubmit.
+    is_manager_editing_own_rejection = (
+        updater_role == "manager" and campaign.status == "draft" and campaign.rejection_reason
+    )
+    is_owner_or_admin = str(campaign.created_by) == str(updater_id) or updater_role == "admin"
+    if not is_owner_or_admin and not is_manager_editing_own_rejection:
         # Raise PermissionViolation
-        raise PermissionViolation("Only the creator or admin can update this campaign")
+        raise PermissionViolation("Only the creator, admin, or a manager reviewing a rejected campaign can update this campaign")
 
     # Check: "scheduled_at" in fields and fields["scheduled_at"]
     if "scheduled_at" in fields and fields["scheduled_at"]: