feat(android): one backup destination, a group the account owns alone

Chosen once at the top of Android Sync for every kind; photos and contacts
go into <folder>/<account>-photos and -contacts. Owner and sole member are
checked at set-up and before every run.

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

1 files changed, 7 insertions, 0 deletions

diff --git a/packages/meshbay-android/app/src/main/assets/bridge/meshbay-bridge.js b/packages/meshbay-android/app/src/main/assets/bridge/meshbay-bridge.js
index 8aba36d..b64d7f2 100644
--- a/packages/meshbay-android/app/src/main/assets/bridge/meshbay-bridge.js
+++ b/packages/meshbay-android/app/src/main/assets/bridge/meshbay-bridge.js
@@ -213,6 +213,13 @@
       keepAlive: (on, text) => call('photosync:keep-alive', on === true, text || ''),
     },
 
+    // Where every backup goes (§9.12): one folder of one group the account
+    // owns and is alone in. Each kind goes into `<account>-<kind>` under it.
+    phoneSync: {
+      destination: () => call('phonesync:destination'),
+      setDestination: (d) => call('phonesync:set-destination', d || null),
+    },
+
     // Contacts backup (§9.13): the phone writes the address book into one
     // file, served at /phonesync/<token> on this origin, when it changed since
     // the last one sent. The page decides when and does the sending.