Function attach_missed_graph

src/ui/http_server.c:1446–1493

Attach the missed-graph skeleton (#963) to the primary layout doc as * "missed_graph": {"nodes":[...], "edges":[...], "offset":{x,y,z}} * — the file structure of files the indexer could not fully cover, laid out * as a satellite cluster beside the code galaxy (the UI renders it as a white * skeleton; clicking it re-centers the camera there). The offset sits on the * -Y side: linked-project

 * this slot collides last. Returns true when a non-empty skeleton was
 * attached; no-op when the project has no missed files. */
static bool attach_missed_graph(yyjson_mut_doc *mdoc, yyjson_mut_val *mroot, cbm_store_t *store,
                                const char *project, double primary_radius) {
    char covproj[512];
    cbm_store_coverage_shadow_project(covproj, sizeof(covproj), project);
    cbm_layout_result_t *ml = cbm_layout_compute(store, covproj, CBM_LAYOUT_OVERVIEW, NULL, 0, 0);
    if (!ml) {
        return false;
    }
    if (ml->node_count == 0) {
        cbm_layout_free(ml);
        return false;
    }
    double miss_radius = layout_radius(ml);
    char *mjson = cbm_layout_to_json(ml);
    cbm_layout_free(ml);
    if (!mjson) {
        return false;
    }
    yyjson_doc *mldoc = yyjson_read(mjson, strlen(mjson), 0);
    free(mjson);
    if (!mldoc) {
        return false;
    }
    yyjson_mut_val *entry = yyjson_mut_obj(mdoc);
    yyjson_val *mlroot = yyjson_doc_get_root(mldoc);
    yyjson_val *mn = yyjson_obj_get(mlroot, "nodes");
    yyjson_val *me = yyjson_obj_get(mlroot, "edges");
    if (mn) {
        yyjson_mut_obj_add_val(mdoc, entry, "nodes", yyjson_val_mut_copy(mdoc, mn));
    }
    if (me) {
        yyjson_mut_obj_add_val(mdoc, entry, "edges", yyjson_val_mut_copy(mdoc, me));
    }
    yyjson_doc_free(mldoc);

    double dist = primary_radius + miss_radius + LAYOUT_GALAXY_PAD;
    if (dist < LAYOUT_GALAXY_SPACING) {
        dist = LAYOUT_GALAXY_SPACING;
    }
    yyjson_mut_val *offset = yyjson_mut_obj(mdoc);
    yyjson_mut_obj_add_real(mdoc, offset, "x", 0.0);
    yyjson_mut_obj_add_real(mdoc, offset, "y", -dist);
    yyjson_mut_obj_add_real(mdoc, offset, "z", 0.0);
    yyjson_mut_obj_add_val(mdoc, entry, "offset", offset);

    yyjson_mut_obj_add_val(mdoc, mroot, "missed_graph", entry);
    return true;
}

static void handle_layout(cbm_http_conn_t *c, const cbm_http_req_t *req) {
    char project[256] = {0};