Add an interactive Tree view (pan/zoom genealogy chart)

Researched how FamilySearch/Geni/MyHeritage lay out trees (switchable pedigree/portrait/fan, an interactive canvas with pan/zoom + click-to-recenter, gender colors, birth-death years) and built a real Tree page on the MIT d3 library family-chart instead of a flat list. Ancestors + descendants around a focus person, click any card to recenter, drag to pan, scroll to zoom — scales to large imported trees. Tree is now the first per-tree sidebar item and the default when opening a tree; People keeps the searchable directory + add/edit.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Signed-off-by: Justin Paul <justin@jpaul.me>

frontend/app/trees/[id]/tree/chart.css

@@ -0,0 +1,880 @@
+.f3 {
+  --female-color: rgb(196, 138, 146);
+  --male-color: rgb(120, 159, 172);
+  --genderless-color: lightgray;
+  --background-color: rgb(33, 33, 33);
+  --text-color: #fff;
+
+  font-family: 'Roboto', sans-serif;
+}
+
+.f3 * {
+  box-sizing: border-box;
+}
+
+.f3 .cursor-pointer {
+  cursor: pointer;
+}
+.f3 svg.main_svg {
+  width: 100%;
+  height: 100%;
+}
+.f3 svg.main_svg text {
+  fill: currentColor;
+}
+.f3 rect.card-female, .f3 .card-female .card-body-rect, .f3 .card-female .text-overflow-mask {
+  fill: var(--female-color);
+}
+.f3 rect.card-male, .f3 .card-male .card-body-rect, .f3 .card-male .text-overflow-mask {
+  fill: var(--male-color);
+}
+.f3 .card-genderless .card-body-rect, .f3 .card-genderless .text-overflow-mask {
+  fill: var(--genderless-color);
+}
+.f3 .card_add .card-body-rect {
+  fill: #3b5560;
+  stroke-width: 4px;
+  stroke: #fff;
+  cursor: pointer;
+}
+.f3 g.card_add text {
+  fill: #fff;
+}
+.f3 .card-main-outline {
+  stroke: currentColor;
+  stroke-width: 3px;
+}
+.f3 .card_family_tree rect {
+  transition: 0.3s;
+}
+.f3 .card_family_tree:hover rect {
+  transform: scale(1.1);
+}
+.f3 .card_add_relative {
+  cursor: pointer;
+  color: #fff;
+  transition: 0.3s;
+}
+.f3 .card_add_relative circle {
+  fill: rgba(0, 0, 0, 0);
+}
+.f3 .card_add_relative:hover {
+  color: black;
+}
+.f3 .card_edit.pencil_icon {
+  color: #fff;
+  transition: 0.3s;
+}
+.f3 .card_edit.pencil_icon:hover {
+  color: black;
+}
+.f3 .card_break_link, .f3 .link_upper, .f3 .link_lower, .f3 .link_particles {
+  transform-origin: 50% 50%;
+  transition: 1s;
+}
+.f3 .card_break_link {
+  color: #fff;
+}
+.f3 .card_break_link.closed .link_upper {
+  transform: translate(-140.5px, 655.6px);
+}
+.f3 .card_break_link.closed .link_upper g {
+  transform: rotate(-58deg);
+}
+.f3 .card_break_link.closed .link_particles {
+  transform: scale(0);
+}
+.f3 .input-field input {
+  height: 2.5rem !important;
+}
+.f3 .input-field > label:not(.label-icon).active {
+  -webkit-transform: translateY(-8px) scale(0.8);
+  transform: translateY(-8px) scale(0.8);
+}
+.f3.f3-cont {
+  width:100%;
+  height:900px;
+  max-height:70vh;
+  background-color: var(--background-color);
+  color: var(--text-color);
+}
+.f3 {
+  position: relative;
+  display: flex;
+}
+
+
+
+
+/* form-info */
+.f3-form input[type="text"],
+.f3-form textarea,
+.f3-form select {
+  width: 100%;
+  padding: 8px 12px;
+  margin: 8px 0;
+  border: 1px solid #ddd;
+  border-radius: 4px;
+  box-sizing: border-box;
+  font-size: 14px;
+  background: var(--background-color);
+  color: currentColor;
+}
+
+.f3-form input[type="text"]:focus,
+.f3-form textarea:focus,
+.f3-form select:focus {
+  box-shadow: 0 0 5px rgba(76, 175, 80, 0.2);
+}
+
+.f3-form button {
+  padding: 10px 20px;
+  border: none;
+  border-radius: 4px;
+  cursor: pointer;
+  font-size: 14px;
+  margin: 10px 0;
+  transition: background-color 0.3s ease-in-out, border-color 0.3s ease-in-out, color 0.3s ease-in-out;
+}
+
+.f3-form button[type="submit"] {
+  background-color: #4CAF50;
+  color: white;
+}
+
+.f3-cancel-btn {
+  background-color: #ccc;
+}
+
+.f3-form .f3-delete-btn {
+  background-color: transparent;
+  border: 1px solid #f44336;
+  color: #f44336;
+  width: 100%;
+  padding: 5px 10px;
+}
+
+.f3-delete-btn:hover {
+  background-color: #da190b;
+  border-color: #da190b;
+  color: #fff;
+}
+
+.f3-delete-btn:disabled {
+  opacity: 0.5;
+  background-color: transparent;
+  color: #f44336;
+  cursor: not-allowed;
+}
+
+.f3-form .f3-remove-relative-btn {
+  background-color: transparent;
+  border: 1px solid currentColor;
+  color: currentColor;
+  width: 100%;
+  padding: 5px 10px;
+}
+
+.f3-remove-relative-btn:hover, .f3-remove-relative-btn.active {
+  background-color: var(--text-color);
+  border-color: var(--text-color);
+  color: var(--background-color);
+}
+
+.f3-radio-group {
+  margin: 15px 0;
+}
+
+.f3-radio-group label {
+  margin-right: 15px;
+  cursor: pointer;
+}
+
+.f3-radio-group input[type="radio"] {
+  margin-right: 5px;
+}
+
+.f3-info-field-label, .f3-form-field label {
+  font-weight: bold;
+  font-size: 12px;
+  display: block;
+  opacity: 0.8;
+}
+
+.f3-info-field-value {
+  font-weight: normal;
+  display: block;
+  border: none;
+  outline: none;
+  border-bottom: 1px solid rgba(255,255,255,0.2);
+  padding-bottom: 1px;
+  margin-bottom: 10px;
+  min-height: 18px;
+}
+
+.f3-form-buttons {
+  text-align: right;
+}
+
+.f3-form-title {
+  text-align: center;
+}
+
+.f3-form.non-editable .f3-form-buttons,
+.f3-form.non-editable .f3-delete-btn,
+.f3-form.non-editable .f3-remove-relative-btn,
+.f3-form.non-editable .f3-link-existing-relative {
+  display: none;
+}
+
+.f3-close-btn {
+  cursor: pointer;
+  position: absolute;
+  left: 10px;
+  top: 8px;
+  font-size: 30px;
+  color: var(--text-color);
+}
+
+.f3-edit-btn {
+  position: relative;
+  top: -1px;
+  width: 24px;
+  height: 24px;
+  cursor: pointer;
+  display: inline-block;
+}
+
+.f3-add-relative-btn {
+  cursor: pointer;
+  width: 27px;
+  height: 27px;
+  margin-right: 5px;
+  display: inline-block;
+}
+
+/* card-html */
+
+.f3 div.card {
+  cursor: pointer;
+  color: var(--text-color);
+  position: relative;
+  line-height: 1.2;
+}
+
+.f3 div.card-image-circle {
+  border-radius: 50%;
+  padding: 5px;
+  width: 90px;
+  height: 90px;
+}
+
+.f3 div.card-image-circle div.card-label {
+  position: absolute;
+  bottom: -10px;
+  left: 50%;
+  transform: translate(-50%, 50%);
+  max-width: 150%;
+  min-height: 22px;
+  text-align: center;
+  background-color: rgba(0, 0, 0, 0.5);
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+  border-radius: 3px;
+  padding: 0 5px;
+}
+
+.f3 div.card-image-circle img {
+  width: 100%;
+  height: 100%;
+  border-radius: 50%;
+  object-fit: cover;
+}
+
+.f3 div.card-image-circle svg {
+  width: 100%;
+  height: 100%;
+  padding: 5px;
+  border-radius: 50%;
+  object-fit: cover;
+}
+
+.f3 div.card-image-circle img {
+  width: 100%;
+  height: 100%;
+  border-radius: 50%;
+  object-fit: cover;
+}
+
+.f3 div.card-rect {
+  padding: 5px;
+  border-radius: 3px;
+  width: 120px;
+  min-height: 70px;
+  overflow: hidden;
+  text-align: center;
+  display: flex;
+  flex-direction: column;
+  justify-content: center;
+}
+
+
+.f3 div.card-image-rect {
+  width: 200px;
+  min-height: 70px;
+  display: flex;
+  align-items: center;
+  border-radius: 5px;
+}
+
+.f3 div.card-image-rect .person-icon {
+  height: 70px;
+  width: 70px;
+  object-fit: cover;
+  flex: 0 0 auto;
+  padding: 5px;
+  margin-right: 10px;
+}
+
+.f3 div.card-image-rect img {
+  height: 70px;
+  width: 70px;
+  object-fit: cover;
+  flex: 0 0 auto;
+  padding: 5px;
+  margin-right: 10px;
+  border-radius: 8px;
+}
+
+.f3 div.card-image-rect svg {
+  object-fit: cover;
+  width: 100%;
+  height: 100%;
+  padding: 5px;
+  border-radius: 7px;
+}
+
+.f3 div.card-image-rect div.card-label {
+  height: 100%;
+  overflow: hidden;
+  display: flex;
+  flex-direction: column;
+  justify-content: center;
+}
+
+.f3 div.mini-tree {
+  text-align: right;
+  position: absolute;
+  top: -15px;
+  right: -2px;
+  z-index: -1;
+}
+.f3 div.mini-tree svg {
+  width: 55px;
+}
+
+.f3 .f3-card-duplicate-tag {
+  position: absolute;
+  top: 2px;
+  right: 2px;
+  color: rgb(255, 251, 220);
+  background-color: rgba(255, 251, 220, 0);
+  border-radius: 50%;
+  padding: 2px;
+  transition: color 0.2s ease-in-out, background-color 0.2s ease-in-out;
+}
+
+.f3 .f3-card-duplicate-hover div.card-inner {
+  transform: translate(0, -2px);
+  outline: 4px solid rgb(255, 251, 220);
+}
+
+.f3 .f3-card-duplicate-hover .f3-card-duplicate-tag {
+  background-color: rgba(255, 251, 220, .8);
+  color: #000;
+}
+
+.f3 .f3-remove-relative-active .card {
+  background-color: var(--background-color);
+}
+
+.f3 .f3-remove-relative-active .card-inner {
+  transition: border 0.2s ease-in-out, opacity 0.2s ease-in-out, transform 0.2s ease-in-out;
+  opacity: .75;
+}
+
+.f3 .f3-remove-relative-active .card:hover .card-inner {
+  opacity: .25;
+}
+
+.f3 .f3-remove-relative-active .card-male.card-depth--1:hover .card-inner {
+  transform: translate(-8px, -8px);
+}
+
+.f3 .f3-remove-relative-active .card.card-female.card-depth--1:hover .card-inner {
+  transform: translate(8px, -8px);
+}
+
+.f3 .f3-remove-relative-active .card.card-female.card-depth-0:hover .card-inner {
+  transform: translate(8px, 0);
+}
+
+.f3 .f3-remove-relative-active .card.card-male.card-depth-0:hover .card-inner {
+  transform: translate(-8px, 0);
+}
+
+.f3 .f3-remove-relative-active .card.card-depth-1:hover .card-inner {
+  transform: translate(0, 8px);
+}
+
+.f3 .f3-remove-relative-active .card.card-main .card-inner {
+  transform: translate(0, 0)!important;
+  opacity: 1!important;
+}
+
+
+
+.f3 div.card > div {
+  transition: transform 0.2s ease-in-out;
+  box-shadow: 0 0 0 0 rgba(0, 0, 0, 0.8);
+}
+
+.f3 .card-inner {
+  outline: 0px solid rgba(255, 255, 255, 1);
+  transition: outline 0.5s ease-in-out;
+}
+
+.f3 div.card-female .card-inner, .f3 div.card-female .person-icon svg {
+  background-color: var(--female-color);
+}
+.f3 div.card-male .card-inner, .f3 div.card-male .person-icon svg {
+  background-color: var(--male-color);
+}
+.f3 div.card-genderless .card-inner, .f3 div.card-genderless .person-icon svg {
+  background-color: var(--genderless-color);
+}
+
+.f3 div.card-new-rel .card-inner, .f3 div.card-new-rel .person-icon svg {
+  background-color: var(--background-color);
+}
+
+.f3 div.card-to-add .card-inner {
+  background-color: var(--background-color);
+  border: 1px solid;
+}
+
+.f3 div.card-to-add .card-inner .card-label {
+  margin: 0 auto;
+}
+
+.f3 div.card-to-add .person-icon {
+  display: none;
+}
+
+.f3 div.card-new-rel .card-inner {
+  border-width: 1px;
+  border-style: dashed;
+  outline: 0px !important;
+}
+.f3 div.card-new-rel.card-female .card-inner, .f3 div.card-to-add.card-female .card-inner {
+  border-color: var(--female-color);
+  color: var(--female-color);
+}
+.f3 div.card-new-rel.card-male .card-inner, .f3 div.card-to-add.card-male .card-inner {
+  color: var(--male-color);
+  border-color: var(--male-color);
+}
+
+.f3 div.card-unknown .card-inner {
+  background-color: var(--background-color);
+  border: 1px solid;
+}
+
+.f3 div.card-unknown .card-inner .card-label {
+  margin: 0 auto;
+}
+
+.f3 div.card-unknown .person-icon {
+  display: none;
+}
+
+.f3 div.card-new-rel .card-inner {
+  border-width: 1px;
+  border-style: dashed;
+  outline: 0px !important;
+}
+.f3 div.card-new-rel.card-female .card-inner, .f3 div.card-unknown.card-female .card-inner {
+  border-color: var(--female-color);
+  color: var(--female-color);
+}
+.f3 div.card-new-rel.card-male .card-inner, .f3 div.card-unknown.card-male .card-inner {
+  color: var(--male-color);
+  border-color: var(--male-color);
+}
+
+.f3 div.card:hover > div {
+  transform: translate(0, -2px);
+}
+.f3 div.card-main .card-inner, .f3 div.card:hover .card-inner {
+  box-shadow: 0 0 20px 0 rgba(0, 0, 0, 0.8);
+}
+
+.f3 div.card-main .card-inner {
+  outline: 4px solid rgba(220, 220, 220, 1);
+}
+
+.f3 div.card-inner.f3-path-to-main {
+  outline: 4px solid rgba(255, 255, 255, 1);
+}
+
+.f3 .link {
+  transition: stroke-width 0.2s ease-in-out;
+}
+
+.f3 .link.f3-path-to-main {
+  stroke-width: 4px;
+}
+
+
+
+
+
+.f3-form-cont {
+  position: relative;
+  z-index: 6;
+  right: 0;
+  top: 0;
+  width: 0;
+  height: 100%;
+  background-color: var(--background-color);
+  overflow: auto;
+  flex: 0 0 auto;
+  box-shadow: 0 0 10px 0 rgba(0, 0, 0, 0.5);
+}
+
+.f3-form-cont.opened {
+  width: 350px;
+}
+
+.f3-form {
+  padding: 20px;
+}
+
+.f3-form hr {
+  border-style: solid; 
+  border-width: thin 0 0 0;
+  opacity: 0.15;
+}
+
+.f3-nav-cont {
+  position: absolute;
+  top: 0;
+  left: 0;
+  width: 100%;
+  display: flex;
+}
+
+.f3-history-controls {
+  padding: 8px 5px 7px 9px;
+  display: inline-block;
+  position: relative;
+  z-index: 2;
+}
+
+.f3-back-button, .f3-forward-button {
+  width: 30px;
+  height: 30px;
+  transition: opacity 0.3s ease;
+  cursor: pointer;
+  display: inline-block;
+  background-color: transparent;
+  border: none;
+  margin-right: 10px;
+  color: currentColor;
+}
+
+.f3-history-controls svg {
+  height: 100%;
+}
+
+.f3-back-button.disabled, .f3-forward-button.disabled {
+  opacity: 0.5;
+}
+
+.f3-modal {
+  display: none;
+  position: absolute;
+  z-index: 10;
+  left: 0;
+  top: 0;
+  width: 100%;
+  height: 100%;
+  overflow: auto;
+  background-color: rgb(0,0,0);
+  background-color: rgba(0,0,0,0.4);
+}
+
+.f3-modal-content {
+  position: relative;
+  background-color: var(--background-color);
+  margin: 15% auto;
+  padding: 20px;
+  border: 1px solid #888;
+  border-radius: 5px;
+  width: 500px;
+  max-width: 90%;
+}
+
+.f3-modal-close {
+  color: #aaa;
+  position: absolute;
+  right: 10px;
+  top: 7px;
+  font-size: 28px;
+  font-weight: bold;
+}
+
+.f3-modal-close:hover,
+.f3-modal-close:focus {
+  color: black;
+  text-decoration: none;
+  cursor: pointer;
+} 
+
+.f3-popup {
+  position: fixed;
+  box-shadow: 0 0 10px 0 rgba(0, 0, 0, 0.8);
+}
+
+.f3-popup-content {
+  position: relative;
+  background-color: var(--background-color);
+  border: 1px solid #888;
+  border-radius: 5px;
+  overflow: hidden;
+  width: 100%;
+  height: 100%;
+}
+
+.f3-popup-nav {
+  height: 20px;
+}
+
+.f3-popup-content-inner {
+  width: 100%;
+  height: 100%;
+}
+
+.f3-popup-close {
+  color: #aaa;
+  position: absolute;
+  z-index: 4;
+  right: 6px;
+  top: 1px;
+  font-size: 28px;
+  font-weight: bold;
+  line-height: 1;
+}
+
+.f3-popup-close:hover,
+.f3-popup-close:focus {
+  color: black;
+  text-decoration: none;
+  cursor: pointer;
+} 
+
+
+
+.f3-btn {
+  position: relative;
+  cursor: pointer;
+  padding: 5px 10px;
+
+  overflow: hidden;
+
+  border-width: 0;
+  outline: none;
+  border-radius: 3px;
+  box-shadow: 0 1px 4px rgba(0, 0, 0, .6);
+  
+  background-color: var(--text-color);
+  color: var(--background-color);
+  
+  transition: background-color .3s;
+  font-size: 14px;
+}
+
+.f3-btn:hover, .f3-btn:focus {
+  background-color: var(--background-color);
+  color: var(--text-color);
+}
+
+.f3-female-bg {
+  background-color: var(--female-color);
+}
+
+.f3-male-bg {
+  background-color: var(--male-color);
+}
+
+.f3-genderless-bg {
+  background-color: var(--genderless-color);
+}
+
+.f3-female-color {
+  color: var(--female-color);
+}
+
+.f3-male-color {
+  color: var(--male-color);
+}
+
+.f3-genderless-color {
+  color: var(--genderless-color);
+}
+
+.f3-autocomplete-cont {
+  position: relative;
+  display: inline-block;
+  z-index: 2;
+  font-size: 14px;
+  width: 200px;
+}
+
+.f3-autocomplete input {
+  border: 1px solid rgba(255, 255, 255, 0.2);
+  background-color: var(--background-color);
+  color: var(--text-color);
+  padding: 10px;
+  width: 100%;
+}
+.f3-autocomplete input:focus {
+  outline: none;
+}
+
+.f3-autocomplete-toggle {
+  position: absolute;
+  right: 10px;
+  top: 10px;
+  cursor: pointer;
+  color: var(--text-color);
+  transition: color 0.3s ease-in-out;
+  width: 20px;
+}
+
+.f3-autocomplete-items {
+  border: 1px solid rgba(255, 255, 255, 0.2);
+  border-top: none;
+  overflow-y: auto;
+  max-height: 0;
+  background-color: var(--background-color);
+  transition: max-height 0.3s ease-in-out;
+}
+
+.f3-autocomplete.active .f3-autocomplete-items {
+  max-height: 300px;
+}
+
+.f3-autocomplete-item > div {
+  padding: 10px;
+  cursor: pointer;
+  background-color: var(--background-color);
+  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
+  transition: background-color 0.3s ease-in-out, color 0.3s ease-in-out;
+}
+.f3-autocomplete-item > div:hover, .f3-autocomplete-item.f3-selected > div {
+  background-color: var(--text-color);
+  color: var(--background-color);
+}
+
+.f3-autocomplete-active {
+  background-color: DodgerBlue !important;
+  color: #ffffff;
+}
+
+.f3-kinship-info {
+  padding: 10px 20px;
+}
+
+.f3-kinship-info .f3-info-field {
+  color:#b3b01e
+}
+
+.f3-kinship-info-icon {
+  cursor:pointer;
+  display:inline-block;
+  width:18px;
+  height:18px;
+  color:#04a4f4;
+  position:relative;
+  top:4px;
+  left:2px;
+}
+
+.f3-kinship-info .f3 {
+  width:100%;
+  height: 100%;
+  position:relative;
+  background-color:rgb(33,33,33);
+  color:#fff;
+}
+
+.f3 .f3-kinship-info .card-kinship-self {
+  min-height: 0px;
+  width: 60px;
+  height: 60px;
+  border-radius: 50%;
+  background-color: var(--background-color) !important;
+  border: solid 3px;
+  color: #437fae;
+  font-weight: bold;
+}
+
+.f3 .f3-kinship-info .card-kinship-self.f3-real-label {
+  width: 150px;
+  height: 50px;
+  border-radius: 50px;
+}
+
+.f3 .f3-kinship-info .card-kinship-rel {
+  min-height: 0px;
+  width: 150px;
+  height: 50px;
+  border-radius: 50px;
+  background-color: #1d3456 !important;
+  font-weight: bold;
+}
+
+.f3 .f3-kinship-info .card-kinship-default {
+  min-height: 0px;
+  width: 150px;
+  height: 50px;
+  border-radius: 50px;
+  background-color: var(--background-color) !important;
+  border: solid 1px;
+}
+
+.f3-kinship-labels-toggle {
+  position: absolute;
+  top: 0;
+  left: 0;
+  z-index: 10;
+  font-size: 12px;
+}
+
+.f3-kinship-labels-toggle label {
+  cursor: pointer;
+  color: #fff;
+  font-weight: bold;
+  text-align: center;
+  padding: 2px 5px;
+}
+
+.f3-kinship-labels-toggle input[type="checkbox"] {
+  cursor: pointer;
+  margin-left: 5px;
+  margin-right: 5px;
+  margin-top: 5px;
+  margin-bottom: 5px;
+}

frontend/app/trees/[id]/tree/page.tsx

@@ -0,0 +1,127 @@
+"use client";
+
+// Vendored from family-chart/dist/styles (the package blocks the CSS subpath export).
+import "./chart.css";
+
+import { useParams, useRouter } from "next/navigation";
+import { useEffect, useRef, useState } from "react";
+
+import { api } from "@/lib/api/client";
+import type { components } from "@/lib/api/schema";
+
+type Relationship = components["schemas"]["RelationshipRead"];
+type Event = components["schemas"]["EventRead"];
+
+function splitName(name: string | null | undefined): [string, string] {
+  const t = (name ?? "").trim().split(/\s+/).filter(Boolean);
+  if (t.length <= 1) return [name ?? "", ""];
+  return [t.slice(0, -1).join(" "), t[t.length - 1]];
+}
+
+export default function TreePage() {
+  const router = useRouter();
+  const params = useParams<{ id: string }>();
+  const treeId = params.id;
+  const containerRef = useRef<HTMLDivElement>(null);
+  const [status, setStatus] = useState<"loading" | "empty" | "ready" | "error">("loading");
+
+  useEffect(() => {
+    let cancelled = false;
+
+    (async () => {
+      const p = await api.GET("/api/v1/trees/{tree_id}/persons", {
+        params: { path: { tree_id: treeId } },
+      });
+      if (p.response.status === 401) {
+        router.push("/login");
+        return;
+      }
+      const [r, e] = await Promise.all([
+        api.GET("/api/v1/trees/{tree_id}/relationships", { params: { path: { tree_id: treeId } } }),
+        api.GET("/api/v1/trees/{tree_id}/events", { params: { path: { tree_id: treeId } } }),
+      ]);
+      const people = p.data ?? [];
+      const rels: Relationship[] = r.data ?? [];
+      const events: Event[] = e.data ?? [];
+      if (people.length === 0) {
+        if (!cancelled) setStatus("empty");
+        return;
+      }
+
+      const parentsOf = (id: string) =>
+        rels.filter((x) => x.type === "parent_child" && x.person_to_id === id).map((x) => x.person_from_id);
+      const childrenOf = (id: string) =>
+        rels.filter((x) => x.type === "parent_child" && x.person_from_id === id).map((x) => x.person_to_id);
+      const partnersOf = (id: string) =>
+        rels
+          .filter((x) => x.type === "partnership" && (x.person_from_id === id || x.person_to_id === id))
+          .map((x) => (x.person_from_id === id ? x.person_to_id : x.person_from_id));
+
+      const birthYear = new Map<string, string>();
+      for (const ev of events) {
+        if (ev.person_id && ev.event_type === "birth" && !birthYear.has(ev.person_id)) {
+          const y = ev.date_start ? ev.date_start.slice(0, 4) : ev.date_value ?? "";
+          if (y) birthYear.set(ev.person_id, y);
+        }
+      }
+
+      const data = people.map((pp) => {
+        const [fn, ln] = splitName(pp.primary_name);
+        return {
+          id: pp.id,
+          data: {
+            "first name": fn || "Unnamed",
+            "last name": ln,
+            birthday: birthYear.get(pp.id) ?? "",
+            gender: pp.gender === "female" ? "F" : "M",
+          },
+          rels: {
+            spouses: partnersOf(pp.id),
+            parents: parentsOf(pp.id),
+            children: childrenOf(pp.id),
+          },
+        };
+      });
+
+      if (cancelled || !containerRef.current) return;
+      try {
+        const f3 = await import("family-chart");
+        containerRef.current.innerHTML = "";
+        const chart = f3.createChart(containerRef.current, data);
+        chart.setCardHtml().setCardDisplay([["first name", "last name"], ["birthday"]]);
+        chart.updateTree({ initial: true });
+        if (!cancelled) setStatus("ready");
+      } catch {
+        if (!cancelled) setStatus("error");
+      }
+    })().catch(() => {
+      if (!cancelled) setStatus("error");
+    });
+
+    return () => {
+      cancelled = true;
+    };
+  }, [router, treeId]);
+
+  return (
+    <div className="space-y-4">
+      <div className="flex flex-wrap items-center justify-between gap-2">
+        <h1 className="text-2xl font-semibold">Tree</h1>
+        <span className="text-sm text-[var(--muted)]">
+          Drag to pan · scroll to zoom · click a person to recenter
+        </span>
+      </div>
+      {status === "empty" && (
+        <p className="text-[var(--muted)]">
+          No people yet — add some under People, or import a GEDCOM.
+        </p>
+      )}
+      {status === "error" && <p className="text-[var(--muted)]">Could not render the tree.</p>}
+      <div
+        ref={containerRef}
+        className="f3 rounded-xl border border-[var(--border)]"
+        style={{ width: "100%", height: "74vh", background: "var(--surface)" }}
+      />
+    </div>
+  );
+}

frontend/app/trees/page.tsx

@@ -77,7 +77,7 @@ export default function TreesPage() {
             <li key={tree.id}>
               <Card className="transition-colors hover:border-bronze/50">
                 <CardContent className="flex items-center justify-between p-4">
-                  <Link href={`/trees/${tree.id}`} className="min-w-0 flex-1">
+                  <Link href={`/trees/${tree.id}/tree`} className="min-w-0 flex-1">
                     <div className="truncate font-medium">{tree.name}</div>
                     <div className="text-xs uppercase tracking-wide text-bronze">
                       {tree.visibility}

frontend/components/app-sidebar.tsx

@@ -7,6 +7,7 @@ import {
   FolderTree,
   Image as ImageIcon,
   LogOut,
+  Network,
   Users,
 } from "lucide-react";
 import Link from "next/link";
@@ -77,6 +78,12 @@ export function AppSidebar() {
           <div className="truncate px-3 pb-1 text-xs font-semibold uppercase tracking-wider text-[var(--muted)]">
             {treeName ?? "Tree"}
           </div>
+          <Item
+            href={`/trees/${treeId}/tree`}
+            label="Tree"
+            icon={Network}
+            active={pathname.startsWith(`/trees/${treeId}/tree`)}
+          />
           <Item
             href={`/trees/${treeId}`}
             label="People"

frontend/package-lock.json

@@ -10,6 +10,7 @@
       "dependencies": {
         "class-variance-authority": "^0.7.1",
         "clsx": "^2.1.1",
+        "family-chart": "^0.9.0",
         "lucide-react": "^0.469.0",
         "next": "^15.1.0",
         "openapi-fetch": "^0.13.0",
@@ -1111,12 +1112,390 @@
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       "dev": true
     },
+    "node_modules/commander": {
+      "version": "7.2.0",
+      "resolved": "https://registry.npmjs.org/commander/-/commander-7.2.0.tgz",
+      "integrity": "sha512-QrWXB+ZQSVPmIWIhtEO9H+gwHaMGYiF5ChvoJ+K9ZGHG/sVsa6yiesAD1GC/x46sET00Xlwo1u49RVVVzvcSkw==",
+      "engines": {
+        "node": ">= 10"
+      }
+    },
     "node_modules/csstype": {
       "version": "3.2.3",
       "resolved": "https://registry.npmjs.org/csstype/-/csstype-3.2.3.tgz",
       "integrity": "sha512-z1HGKcYy2xA8AGQfwrn0PAy+PB7X/GSj3UVJW9qKyn43xWa+gl5nXmU4qqLMRzWVLFC8KusUX8T/0kCiOYpAIQ==",
       "dev": true
     },
+    "node_modules/d3": {
+      "version": "7.9.0",
+      "resolved": "https://registry.npmjs.org/d3/-/d3-7.9.0.tgz",
+      "integrity": "sha512-e1U46jVP+w7Iut8Jt8ri1YsPOvFpg46k+K8TpCb0P+zjCkjkPnV7WzfDJzMHy1LnA+wj5pLT1wjO901gLXeEhA==",
+      "dependencies": {
+        "d3-array": "3",
+        "d3-axis": "3",
+        "d3-brush": "3",
+        "d3-chord": "3",
+        "d3-color": "3",
+        "d3-contour": "4",
+        "d3-delaunay": "6",
+        "d3-dispatch": "3",
+        "d3-drag": "3",
+        "d3-dsv": "3",
+        "d3-ease": "3",
+        "d3-fetch": "3",
+        "d3-force": "3",
+        "d3-format": "3",
+        "d3-geo": "3",
+        "d3-hierarchy": "3",
+        "d3-interpolate": "3",
+        "d3-path": "3",
+        "d3-polygon": "3",
+        "d3-quadtree": "3",
+        "d3-random": "3",
+        "d3-scale": "4",
+        "d3-scale-chromatic": "3",
+        "d3-selection": "3",
+        "d3-shape": "3",
+        "d3-time": "3",
+        "d3-time-format": "4",
+        "d3-timer": "3",
+        "d3-transition": "3",
+        "d3-zoom": "3"
+      },
+      "engines": {
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+        "d3-format": "1 - 3",
+        "d3-interpolate": "1.2.0 - 3",
+        "d3-time": "2.1.1 - 3",
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+        "d3-path": "^3.1.0"
+      },
+      "engines": {
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+    "node_modules/d3-time": {
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+        "d3-array": "2 - 3"
+      },
+      "engines": {
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+      }
+    },
+    "node_modules/d3-time-format": {
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/d3-time-format/-/d3-time-format-4.1.0.tgz",
+      "integrity": "sha512-dJxPBlzC7NugB2PDLwo9Q8JiTR3M3e4/XANkreKSUxF8vvXKqm1Yfq4Q5dl8budlunRVlUUaDUgFt7eA8D6NLg==",
+      "dependencies": {
+        "d3-time": "1 - 3"
+      },
+      "engines": {
+        "node": ">=12"
+      }
+    },
+    "node_modules/d3-timer": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/d3-timer/-/d3-timer-3.0.1.tgz",
+      "integrity": "sha512-ndfJ/JxxMd3nw31uyKoY2naivF+r29V+Lc0svZxe1JvvIRmi8hUsrMvdOwgS1o6uBHmiz91geQ0ylPP0aj1VUA==",
+      "engines": {
+        "node": ">=12"
+      }
+    },
+    "node_modules/d3-transition": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/d3-transition/-/d3-transition-3.0.1.tgz",
+      "integrity": "sha512-ApKvfjsSR6tg06xrL434C0WydLr7JewBB3V+/39RMHsaXTOG0zmt/OAXeng5M5LBm0ojmxJrpomQVZ1aPvBL4w==",
+      "dependencies": {
+        "d3-color": "1 - 3",
+        "d3-dispatch": "1 - 3",
+        "d3-ease": "1 - 3",
+        "d3-interpolate": "1 - 3",
+        "d3-timer": "1 - 3"
+      },
+      "engines": {
+        "node": ">=12"
+      },
+      "peerDependencies": {
+        "d3-selection": "2 - 3"
+      }
+    },
+    "node_modules/d3-zoom": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/d3-zoom/-/d3-zoom-3.0.0.tgz",
+      "integrity": "sha512-b8AmV3kfQaqWAuacbPuNbL6vahnOJflOhexLzMMNLga62+/nh0JzvJ0aO/5a5MVgUFGS7Hu1P9P03o3fJkDCyw==",
+      "dependencies": {
+        "d3-dispatch": "1 - 3",
+        "d3-drag": "2 - 3",
+        "d3-interpolate": "1 - 3",
+        "d3-selection": "2 - 3",
+        "d3-transition": "2 - 3"
+      },
+      "engines": {
+        "node": ">=12"
+      }
+    },
     "node_modules/debug": {
       "version": "4.4.3",
       "resolved": "https://registry.npmjs.org/debug/-/debug-4.4.3.tgz",
@@ -1134,6 +1513,14 @@
         }
       }
     },
+    "node_modules/delaunator": {
+      "version": "5.1.0",
+      "resolved": "https://registry.npmjs.org/delaunator/-/delaunator-5.1.0.tgz",
+      "integrity": "sha512-AGrQ4QSgssa1NGmWmLPqN5NY2KajF5MqxetNEO+o0n3ZwZZeTmt7bBnvzHWrmkZFxGgr4HdyFgelzgi06otLuQ==",
+      "dependencies": {
+        "robust-predicates": "^3.0.2"
+      }
+    },
     "node_modules/detect-libc": {
       "version": "2.1.2",
       "resolved": "https://registry.npmjs.org/detect-libc/-/detect-libc-2.1.2.tgz",
@@ -1156,6 +1543,14 @@
         "node": ">=10.13.0"
       }
     },
+    "node_modules/family-chart": {
+      "version": "0.9.0",
+      "resolved": "https://registry.npmjs.org/family-chart/-/family-chart-0.9.0.tgz",
+      "integrity": "sha512-+JdLr1Oo+YFnQWUXgdnk4nCMTbe1MXKdpbx3KEBXPeq2oX+2v5ccmrcK39CZ761/zQfgSHFZ2cT/+gbaeeACcA==",
+      "dependencies": {
+        "d3": "^7.9.0"
+      }
+    },
     "node_modules/fast-deep-equal": {
       "version": "3.1.3",
       "resolved": "https://registry.npmjs.org/fast-deep-equal/-/fast-deep-equal-3.1.3.tgz",
@@ -1181,6 +1576,17 @@
         "node": ">= 14"
       }
     },
+    "node_modules/iconv-lite": {
+      "version": "0.6.3",
+      "resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.6.3.tgz",
+      "integrity": "sha512-4fCk79wshMdzMp2rH06qWrJE4iolqLhCUH+OiuIgU++RB0+94NlDL81atO7GX55uUKueo0txHNtvEyI6D7WdMw==",
+      "dependencies": {
+        "safer-buffer": ">= 2.1.2 < 3.0.0"
+      },
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
     "node_modules/index-to-position": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/index-to-position/-/index-to-position-1.2.0.tgz",
@@ -1193,6 +1599,14 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/internmap": {
+      "version": "2.0.3",
+      "resolved": "https://registry.npmjs.org/internmap/-/internmap-2.0.3.tgz",
+      "integrity": "sha512-5Hh7Y1wQbvY5ooGgPbDaL5iYLAPzMTUrjMulskHLH6wnv/A+1q5rgEaiuqEjB+oxGXIVZs1FF+R/KPN3ZSQYYg==",
+      "engines": {
+        "node": ">=12"
+      }
+    },
     "node_modules/jiti": {
       "version": "2.7.0",
       "resolved": "https://registry.npmjs.org/jiti/-/jiti-2.7.0.tgz",
@@ -1734,6 +2148,21 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/robust-predicates": {
+      "version": "3.0.3",
+      "resolved": "https://registry.npmjs.org/robust-predicates/-/robust-predicates-3.0.3.tgz",
+      "integrity": "sha512-NS3levdsRIUOmiJ8FZWCP7LG3QpJyrs/TE0Zpf1yvZu8cAJJ6QMW92H1c7kWpdIHo8RvmLxN/o2JXTKHp74lUA=="
+    },
+    "node_modules/rw": {
+      "version": "1.3.3",
+      "resolved": "https://registry.npmjs.org/rw/-/rw-1.3.3.tgz",
+      "integrity": "sha512-PdhdWy89SiZogBLaw42zdeqtRJ//zFd2PgQavcICDUgJT5oW10QCRKbJ6bg4r0/UY2M6BWd5tkxuGFRvCkgfHQ=="
+    },
+    "node_modules/safer-buffer": {
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/safer-buffer/-/safer-buffer-2.1.2.tgz",
+      "integrity": "sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg=="
+    },
     "node_modules/scheduler": {
       "version": "0.27.0",
       "resolved": "https://registry.npmjs.org/scheduler/-/scheduler-0.27.0.tgz",

frontend/package.json

@@ -10,23 +10,24 @@
     "gen:api": "openapi-typescript ./openapi.json -o ./lib/api/schema.d.ts --default-non-nullable false"
   },
   "dependencies": {
-    "next": "^15.1.0",
-    "react": "^19.0.0",
-    "react-dom": "^19.0.0",
-    "openapi-fetch": "^0.13.0",
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
-    "tailwind-merge": "^2.6.0",
+    "family-chart": "^0.9.0",
-    "lucide-react": "^0.469.0"
+    "lucide-react": "^0.469.0",
+    "next": "^15.1.0",
+    "openapi-fetch": "^0.13.0",
+    "react": "^19.0.0",
+    "react-dom": "^19.0.0",
+    "tailwind-merge": "^2.6.0"
   },
   "devDependencies": {
-    "typescript": "^5.7.0",
+    "@tailwindcss/postcss": "^4.0.0",
     "@types/node": "^22.10.0",
     "@types/react": "^19.0.0",
     "@types/react-dom": "^19.0.0",
-    "tailwindcss": "^4.0.0",
+    "openapi-typescript": "^7.5.0",
-    "@tailwindcss/postcss": "^4.0.0",
     "postcss": "^8.4.49",
-    "openapi-typescript": "^7.5.0"
+    "tailwindcss": "^4.0.0",
+    "typescript": "^5.7.0"
   }
 }

frontend/types/family-chart.d.ts

@@ -0,0 +1,2 @@
+declare module "family-chart";
+declare module "family-chart/dist/styles/family-chart.css";