Add application support teams with contacts

Replaces the legacy supportteams/appowners pair: supportteams
(teamname unique, teamurl ServiceNow link) + supportteamcontacts
(multiple named contacts with SSO per team, the people you reach out
to), applications.supportteamid intact. Migration 7d18 migrates each
legacy team owner into a contact, drops appowners, and has a validated
downgrade. New /api/supportteams CRUD (admin writes, import-mode
timestamps, teamname lookup), Support card on application detail,
contacts column on the list, and a settings management page.
IMPORT-API.md mapping updated to the concrete endpoints.

658 tests pass; live dev migration applied (24 teams / 24 contacts);
fresh-install and downgrade round-trips verified on scratch DBs.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

shopdb/core/models/application.py

@@ -2,39 +2,8 @@
 
 from shopdb.extensions import db
 from .base import BaseModel
-
-
-class AppOwner(BaseModel):
-    """Application owner/contact."""
-    __tablename__ = 'appowners'
-
-    appownerid = db.Column(db.Integer, primary_key=True)
-    appowner = db.Column(db.String(100), nullable=False)
-    sso = db.Column(db.String(50))
-    email = db.Column(db.String(100))
-
-    # Relationships
-    supportteams = db.relationship('SupportTeam', back_populates='owner', lazy='dynamic')
-
-    def __repr__(self):
-        return f"<AppOwner {self.appowner}>"
-
-
-class SupportTeam(BaseModel):
-    """Application support team."""
-    __tablename__ = 'supportteams'
-
-    supportteamid = db.Column(db.Integer, primary_key=True)
-    teamname = db.Column(db.String(100), nullable=False)
-    teamurl = db.Column(db.String(255))
-    appownerid = db.Column(db.Integer, db.ForeignKey('appowners.appownerid'))
-
-    # Relationships
-    owner = db.relationship('AppOwner', back_populates='supportteams')
-    applications = db.relationship('Application', back_populates='supportteam', lazy='dynamic')
-
-    def __repr__(self):
-        return f"<SupportTeam {self.teamname}>"
+# SupportTeam / SupportTeamContact live in supportteam.py; imported by the
+# models package so the Application.supportteam relationship resolves.
 
 
 class Application(BaseModel):
@@ -63,6 +32,22 @@ class Application(BaseModel):
     supportteam = db.relationship('SupportTeam', back_populates='applications')
     versions = db.relationship('AppVersion', back_populates='application', lazy='dynamic')
 
+    def to_dict(self):
+        """Serialize, flattening the support team + its active contacts.
+
+        Emits supportteamname, teamurl, and the team's active contacts so the
+        frontend needs a single call to render the Support card.
+        """
+        result = super().to_dict()
+        team = self.supportteam
+        result['supportteamname'] = team.teamname if team else None
+        result['teamurl'] = team.teamurl if team else None
+        result['contacts'] = [
+            {'name': c.name, 'sso': c.sso}
+            for c in team.active_contacts()
+        ] if team else []
+        return result
+
     def __repr__(self):
         return f"<Application {self.appname}>"