feat: enrich /api/v1/dashboard with family profile display fields

APIDossierEntry now includes initials, color, age, dob, sex, is_self —
computed server-side using the same avatar color palette and age logic
as the web portal dashboard. Self entry now includes name (was empty).
Relation field now uses proper name from RBAC relation int.

Native mobile family switcher UI can display rich profile cards without
any additional API calls.

portal/api_mobile.go

@@ -8,6 +8,7 @@ import (
 	"net/http"
 	"strconv"
 	"strings"
+	"time"
 
 	"inou/lib"
 )
@@ -185,6 +186,12 @@ type APIDossierEntry struct {
 	Name     string `json:"name"`
 	Relation string `json:"relation"`
 	CanAdd   bool   `json:"can_add"`
+	Initials string `json:"initials"`
+	Color    string `json:"color"`
+	Age      string `json:"age"`       // e.g. "8y", "42y", "" if unknown
+	DOB      string `json:"dob"`       // YYYY-MM-DD or ""
+	Sex      int    `json:"sex"`       // 0=unknown, 1=male, 2=female
+	IsSelf   bool   `json:"is_self"`
 }
 
 type APIDashboardResponse struct {
@@ -206,9 +213,15 @@ func handleAPIDashboard(w http.ResponseWriter, r *http.Request) {
 	// Add self first
 	dossiers = append(dossiers, APIDossierEntry{
 		GUID:     formatHexID(d.DossierID),
-		Name:     "", // Empty means "self"
+		Name:     d.Name,
 		Relation: "self",
 		CanAdd:   true,
+		Initials: apiInitials(d.Name),
+		Color:    apiColor(d.DossierID),
+		Age:      apiAge(d.DateOfBirth),
+		DOB:      apiDOB(d.DateOfBirth),
+		Sex:      d.Sex,
+		IsSelf:   true,
 	})
 
 	// Add others
@@ -223,8 +236,13 @@ func handleAPIDashboard(w http.ResponseWriter, r *http.Request) {
 		dossiers = append(dossiers, APIDossierEntry{
 			GUID:     formatHexID(a.DossierID),
 			Name:     target.Name,
-			Relation: "other", // Relation removed from RBAC
+			Relation: relationName(a.Relation),
 			CanAdd:   (a.Ops & lib.PermWrite) != 0,
+			Initials: apiInitials(target.Name),
+			Color:    apiColor(a.DossierID),
+			Age:      apiAge(target.DateOfBirth),
+			DOB:      apiDOB(target.DateOfBirth),
+			Sex:      target.Sex,
 		})
 	}
 
@@ -306,3 +324,41 @@ func relationName(rel int) string {
 	default: return "other"
 	}
 }
+
+func apiInitials(name string) string {
+	parts := strings.Fields(name)
+	if len(parts) == 0 { return "?" }
+	first := []rune(parts[0])
+	if len(parts) == 1 {
+		if len(first) == 0 { return "?" }
+		return strings.ToUpper(string(first[:1]))
+	}
+	last := []rune(parts[len(parts)-1])
+	if len(first) == 0 || len(last) == 0 { return "?" }
+	return strings.ToUpper(string(first[:1]) + string(last[:1]))
+}
+
+var apiAvatarColors = []string{
+	"#C47A3D", "#5AAD8A", "#7E8FC2", "#C26E6E",
+	"#9A82B8", "#C2963D", "#6BA0B8", "#B87898",
+	"#7DAD6B", "#8B7D6B",
+}
+
+func apiColor(id string) string {
+	if len(id) < 2 { return apiAvatarColors[0] }
+	b, _ := strconv.ParseUint(id[len(id)-2:], 16, 8)
+	return apiAvatarColors[b%uint64(len(apiAvatarColors))]
+}
+
+func apiAge(dob string) string {
+	if len(dob) < 10 { return "" }
+	t, err := time.Parse("2006-01-02", dob[:10])
+	if err != nil { return "" }
+	years := int(time.Since(t).Hours() / 8766)
+	return fmt.Sprintf("%dy", years)
+}
+
+func apiDOB(dob string) string {
+	if len(dob) < 10 { return "" }
+	return dob[:10]
+}