Tree layout toggles (landscape/portrait/fan), card->profile, server search

Tree page gets Landscape/Portrait/Fan toggles: landscape & portrait via family-chart's orientation; a hand-rolled radial Fan chart of ancestors (rings per generation, click to recenter). Clicking a card recenters and updates an 'Open <name> →' link to that person's profile. The People directory search now hits the server-side pg_trgm fuzzy endpoint (debounced) so it spans the whole tree, not just the loaded page.

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

frontend/openapi.json

@@ -564,6 +564,22 @@
               "default": false,
               "title": "Deleted"
             }
+          },
+          {
+            "name": "q",
+            "in": "query",
+            "required": false,
+            "schema": {
+              "anyOf": [
+                {
+                  "type": "string"
+                },
+                {
+                  "type": "null"
+                }
+              ],
+              "title": "Q"
+            }
           }
         ],
         "responses": {