android: member list screen + link status dots, ipv6 autoconnect fixes

Android chatgui:
- New MemberListScreen with member list, detail card, edit dialog
- Link status dots (green/red/grey) per address in detail card (1s poll)
- Self-node name coloured green
- ChatScreen: people icon in TopAppBar

IPv6 autoconnect fixes (3 bugs in conn_mgr/topo):
- topo_node_sqlite_node_load: load v6 addresses from DB
- topo_node_registry_store: merge v6_addrs into existing node
- cm_sock_v6_classify: wildcard [::] treated as CM_V6_DIR
- cm_add_v6_link: htons(port) was missing

Memory fixes:
- strdup→u_strdup in bridge (7 instances)
- u_realloc cap update before success check (3 instances)
- char sql[256]→[512] for truncated SELECT

Chat member hash now includes addresses for change detection

Linux chatgui:
- Link status dots in AccountList detail panel (1s poll)
- Self-node name in green in member list

src/chat/member_sync.c

@@ -126,8 +126,32 @@ static int _member_update_bucket_hash(void* ctx, const char* ns, uint8_t level,
         const char* atags = (const char*)sqlite3_column_text(stmt, 7);
         const uint8_t* atsig = (const uint8_t*)sqlite3_column_blob(stmt, 8);
         if (!x25 || !ed) continue;
+
+        uint8_t addrs[2048]; int addr_off = 0; int addr_count = 0;
+        sqlite3_stmt* as = NULL;
+        sqlite3_prepare_v2(db,
+            "SELECT family, socket_id, address, port FROM node_addresses WHERE node_id=? AND addr_type=0"
+            " ORDER BY family, address, port", -1, &as, NULL);
+        if (as) {
+            sqlite3_bind_int64(as, 1, (sqlite3_int64)nid);
+            while (sqlite3_step(as) == SQLITE_ROW && addr_off < (int)sizeof(addrs) - 8) {
+                int fam = sqlite3_column_int(as, 0);
+                int sid = sqlite3_column_int(as, 1);
+                addrs[addr_off++] = (uint8_t)fam;
+                addrs[addr_off++] = (uint8_t)sid;
+                int ip_sz = fam == 4 ? 4 : 16;
+                memcpy(addrs + addr_off, sqlite3_column_blob(as, 2), (size_t)ip_sz);
+                addr_off += ip_sz;
+                uint16_t p = (uint16_t)sqlite3_column_int(as, 3);
+                addrs[addr_off++] = (uint8_t)(p >> 8);
+                addrs[addr_off++] = (uint8_t)(p & 0xFF);
+                addr_count++;
+            }
+            sqlite3_finalize(as);
+        }
+
         uint8_t mh[MT_HASH_SIZE];
-        _compute_member_hash(nid, x25, ed, sig, jts, usig, uts, NULL, 0, atags, atsig, mh);
+        _compute_member_hash(nid, x25, ed, sig, jts, usig, uts, addrs, addr_count, atags, atsig, mh);
         EVP_DigestUpdate(sha_ctx, mh, MT_HASH_SIZE);
         count++;
     }