feat(android): back the phone's contacts up to a group of one's own

A Contacts backup section on the Android Sync page sends a dated .vcf into
<folder>/<account>-contacts once a day when the address book changed, only
to a group the account is alone in, checked again at every run.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

1 files changed, 8 insertions, 5 deletions

diff --git a/packages/meshbay-hub/src/meshbay_hub/static/photo-sync.js b/packages/meshbay-hub/src/meshbay_hub/static/photo-sync.js
index 74084b8..77d050e 100644
--- a/packages/meshbay-hub/src/meshbay_hub/static/photo-sync.js
+++ b/packages/meshbay-hub/src/meshbay_hub/static/photo-sync.js
@@ -229,8 +229,11 @@ async function send(transport, cfg, items, metered) {
   setState({ phase: 'up_to_date', done, total: items.length });
 }
 
-/** One photo, under a slot the node granted — the backup queues like anyone. */
-async function upload(transport, item) {
+/**
+ * One photo, under a slot the node granted: the backup queues like anyone.
+ * `file` is how its bytes come from the phone; contacts and messages pass theirs.
+ */
+export async function upload(transport, item, file = platform.photoSync.file) {
   const lease = transport.openTransfer({ kind: 'upload', bytes: item.size });
   try {
     let timeout;
@@ -240,8 +243,8 @@ async function upload(transport, item) {
         timeout = setTimeout(() => reject(new Error('The node is busy')), LEASE_WAIT_MS);
       }),
     ]).finally(() => clearTimeout(timeout));
-    const file = await platform.photoSync.file(item.token, item.name);
-    return await transport.uploadFile(file, {
+    const bytes = await file(item.token, item.name);
+    return await transport.uploadFile(bytes, {
       dir: item.dir, root: item.dir.split('/')[0], tr: lease.tr,
     });
   } finally {
@@ -250,7 +253,7 @@ async function upload(transport, item) {
 }
 
 /** `<folder>/YYYY/YYYY-MM`, one level at a time; a level that exists is fine. */
-async function makeDirs(transport, folder, dir, dirs) {
+export async function makeDirs(transport, folder, dir, dirs) {
   let at = folder;
   for (const name of dir.slice(folder.length + 1).split('/').filter(Boolean)) {
     const next = `${at}/${name}`;