feat(iace): surface OSHA distance anchor in Maßnahmen tab (name-resolved)

Makes the OSHA minimum-distance anchor visible per measure in a project
without a DB schema change or re-seed: persisted mitigations store the
measure NAME verbatim (not the catalog ID), and measure names are unique
across the 578-entry library (pinned by test), so a name→ID resolver
bridges the gap.

Backend: MeasureIDByName + MinimumDistancesForMeasureName/LinksForMeasureName;
/iace/minimum-distances now accepts ?measure_name=; link table enriched with
measure_name for one-request UI matching.
Frontend: useMinimumDistances loads the link table once and keys it by name;
OshaDistanceNote renders the anchor (value/CFR/license/EU-hint/relation) on the
matching measure group in the Maßnahmen tab.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

ai-compliance-sdk/internal/iace/minimum_distances_test.go

@@ -113,6 +113,38 @@ func TestMeasureDistanceLinks_ValueSourceProseConsistency(t *testing.T) {
 	}
 }
 
+// The name→ID resolver underpins surfacing OSHA anchors on persisted
+// mitigations (which store the name, not the catalog ID). It is only safe if
+// measure names are unique — pin that, and that the resolver round-trips for
+// every linked measure.
+func TestMeasureNames_UniqueAndResolvable(t *testing.T) {
+	idByName := map[string]string{}
+	nameByID := map[string]string{}
+	for _, m := range GetProtectiveMeasureLibrary() {
+		if prev, dup := idByName[m.Name]; dup {
+			t.Errorf("duplicate measure name %q (IDs %s, %s) — name→ID resolver unsafe",
+				m.Name, prev, m.ID)
+		}
+		idByName[m.Name] = m.ID
+		nameByID[m.ID] = m.Name
+	}
+
+	for _, l := range AllMeasureDistanceLinks() {
+		name := nameByID[l.MeasureID]
+		if name == "" {
+			t.Errorf("linked measure %q not found in library", l.MeasureID)
+			continue
+		}
+		gotID, ok := MeasureIDByName(name)
+		if !ok || gotID != l.MeasureID {
+			t.Errorf("MeasureIDByName(%q) = %q,%v; want %q", name, gotID, ok, l.MeasureID)
+		}
+		if len(MinimumDistancesForMeasureName(name)) != len(MinimumDistancesForMeasure(l.MeasureID)) {
+			t.Errorf("name vs id resolution mismatch for %q", l.MeasureID)
+		}
+	}
+}
+
 // proseMentionsDistance reports whether the (dot-stripped, lowercased) measure
 // text contains a numeric form of the distance's value, formula or recommended mm.
 func proseMentionsDistance(text string, md MinimumDistance) bool {