Lagebild, Stufe 1: Einheiten als aufklappbare Container (#711)

- TeamOverview.RollUp: je Einheit die Zustaende aller Agenten darin und
  darunter, offene Freigaben und der dringlichste Zustand (Urgency:
  haengt > Problem > Freigabe > Budget > arbeitet > frei). Gezaehlt wird in
  der Instanz, die Seite zeichnet nur.
- /api/team liefert Einheiten und je Agent Einheit und Leitung.
- team.js: Einheiten als Container, zugeklappt als Kasten mit
  Zusammenfassung ("6 agents · ⚠ 1 · ✋ 1 · ▶ 2") in der Farbe des
  dringlichsten Zustands. Kanten laufen zum sichtbaren Stellvertreter und
  werden gebuendelt (×n); was in einer zugeklappten Einheit bleibt, wird
  nicht gezeichnet. Bis 15 Agenten alles offen, darueber nur die oberste
  Ebene; der Zustand je Instanz im localStorage.
- Seitenleiste fuer Einheiten: Pfad, Ziel, Mitglieder (Leitung zuerst),
  Untereinheiten, Auf-/Zuklappen, Link zur Organisation.
- Layout: rectpacking trifft das Seitenverhaeltnis nur grob; es werden
  bis zu vier Vorgaben probiert und die zur Flaeche passendste behalten.
- Sprachschluessel en/de.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/ClawdDotNet.App.Tests/Services/TeamOverviewTests.cs

@@ -1,5 +1,7 @@
 using ClawdDotNet.App.Services;
 using ClawdDotNet.Core.Activity;
+using ClawdDotNet.Core.Config;
+using ClawdDotNet.Core.Organisation;
 using Shouldly;
 
 namespace ClawdDotNet.App.Tests.Services;
@@ -79,4 +81,85 @@ public sealed class TeamOverviewTests
     public void A_cancelled_run_is_not_a_problem()
         // Cancelled means a human stopped it — that was a decision, not a fault.
         => TeamOverview.Classify([], 0, "Cancelled", TimeSpan.Zero, Now).ShouldBe(TeamState.Idle);
+
+    // ═══════════════════ stage 1: units roll up ═══════════════════
+
+    /// <summary>marketing (lead) › amazon (lead, ads) ; accounting (bookkeeper) ; ceo at the top.</summary>
+    private static OrgChart Shop() => new(
+        [
+            new UnitConfig { Id = "marketing", Name = "Marketing", LeaderAgentId = "marketing-lead" },
+            new UnitConfig { Id = "amazon", Name = "Amazon", ParentId = "marketing", LeaderAgentId = "amazon-lead" },
+            new UnitConfig { Id = "accounting", Name = "Accounting" }
+        ],
+        [
+            new AgentConfig { AgentId = "ceo" },
+            new AgentConfig { AgentId = "marketing-lead", UnitId = "marketing" },
+            new AgentConfig { AgentId = "amazon-lead", UnitId = "amazon" },
+            new AgentConfig { AgentId = "ads", UnitId = "amazon" },
+            new AgentConfig { AgentId = "bookkeeper", UnitId = "accounting" }
+        ]);
+
+    private static TeamMember Member(string id, string? unit, TeamState state, int approvals = 0)
+        => new(id, id, "m", state, [], approvals, null, null, null, 0, unit);
+
+    [Fact]
+    public void A_problem_deep_down_shows_on_every_container_above_it()
+    {
+        var units = TeamOverview.RollUp(Shop(),
+        [
+            Member("ceo", null, TeamState.Working),
+            Member("marketing-lead", "marketing", TeamState.Working),
+            Member("amazon-lead", "amazon", TeamState.Idle),
+            Member("ads", "amazon", TeamState.Problem),
+            Member("bookkeeper", "accounting", TeamState.Idle)
+        ]);
+
+        var marketing = units.Single(u => u.Id == "marketing");
+        marketing.Agents.ShouldBe(3, "its own lead and the two in amazon below");
+        marketing.Worst.ShouldBe(TeamState.Problem);
+        marketing.States[TeamState.Working].ShouldBe(1);
+        marketing.States[TeamState.Problem].ShouldBe(1);
+
+        units.Single(u => u.Id == "amazon").Worst.ShouldBe(TeamState.Problem);
+        units.Single(u => u.Id == "accounting").Worst.ShouldBe(TeamState.Idle);
+    }
+
+    [Fact]
+    public void Open_approvals_are_added_up_along_the_tree()
+    {
+        var units = TeamOverview.RollUp(Shop(),
+        [
+            Member("marketing-lead", "marketing", TeamState.WaitingForApproval, approvals: 1),
+            Member("ads", "amazon", TeamState.WaitingForApproval, approvals: 2)
+        ]);
+
+        units.Single(u => u.Id == "marketing").PendingApprovals.ShouldBe(3);
+        units.Single(u => u.Id == "amazon").PendingApprovals.ShouldBe(2);
+    }
+
+    [Fact]
+    public void A_unit_knows_its_path_and_its_lead()
+    {
+        var amazon = TeamOverview.RollUp(Shop(), []).Single(u => u.Id == "amazon");
+
+        amazon.Path.ShouldBe("Marketing / Amazon");
+        amazon.LeaderAgentId.ShouldBe("amazon-lead");
+        amazon.Agents.ShouldBe(0);
+        amazon.Worst.ShouldBe(TeamState.Idle);
+    }
+
+    [Fact]
+    public void Stuck_is_the_most_urgent_and_idle_the_least()
+    {
+        var byUrgency = Enum.GetValues<TeamState>().OrderByDescending(TeamOverview.Urgency).ToList();
+
+        byUrgency.First().ShouldBe(TeamState.Stuck);
+        byUrgency.Last().ShouldBe(TeamState.Idle);
+        TeamOverview.Urgency(TeamState.Problem).ShouldBeGreaterThan(TeamOverview.Urgency(TeamState.WaitingForApproval));
+    }
+
+    [Fact]
+    public void Without_units_there_is_nothing_to_roll_up()
+        => TeamOverview.RollUp(new OrgChart([], [new AgentConfig { AgentId = "a" }]), [Member("a", null, TeamState.Problem)])
+            .ShouldBeEmpty();
 }