fix: align Target governance links to shared edge midpoints

scripts/target-midpoints.test.mjs

@@ -0,0 +1,31 @@
+import {test} from 'node:test';
+import assert from 'node:assert/strict';
+import {readFileSync} from 'node:fs';
+import {createRouter} from '../vendor/archify/renderers/architecture/routing.mjs';
+import {segmentIntersectsRect} from '../vendor/archify/renderers/shared/geometry.mjs';
+
+for (const suffix of ['', '-mobile']) {
+  test(`Target${suffix} uses shared native midpoint ports without node crossings`, () => {
+    const diagram = JSON.parse(readFileSync(`diagrams/strategy-target${suffix}.architecture.json`, 'utf8'));
+    const boxes = new Map(diagram.components.map(({id, pos: [x, y], size: [width, height]}) =>
+      [id, {id, x, y, width, height, cx: x + width / 2, cy: y + height / 2}]));
+    const router = createRouter(boxes, diagram.connections, {distinctAutomaticPorts: true});
+    const agent = boxes.get('agent');
+    for (const edge of diagram.connections.filter(edge => edge.from === 'agent')) {
+      const side = suffix ? 'left' : ['scope', 'architecture', 'releases'].includes(edge.to) ? 'top'
+        : ['planning', 'delivery', 'uat'].includes(edge.to) ? 'bottom' : edge.to === 'security' ? 'left' : 'right';
+      assert.equal(edge.fromSide, side, edge.id);
+      assert(edge.via || (edge.route && edge.route !== 'auto'), `${edge.id} must opt out of automatic port spreading`);
+      const expected = {top: [agent.cx, agent.y], bottom: [agent.cx, agent.y + agent.height],
+        left: [agent.x, agent.cy], right: [agent.x + agent.width, agent.cy]}[side];
+      const points = router.pathFor(edge).points;
+      assert.deepEqual(points[0], expected, edge.id);
+      for (let i = 1; i < points.length; i++) {
+        for (const box of boxes.values()) {
+          if ([edge.from, edge.to].includes(box.id)) continue;
+          assert(!segmentIntersectsRect({start: points[i - 1], end: points[i]}, box), `${edge.id} crosses ${box.id}`);
+        }
+      }
+    }
+  });
+}