feat(shard)!: declare wire protocol 3

The site's declared version is the admin-set uo_link_config.protocol column, so
the sidecar's PROTOCOL_VERSION 2 -> 3 bump has to be matched here or every REST
call 409s and uoLinkSocket closes the WS on the ws.hello mismatch. Five places
carry the number and all five move together: the column default, the model's
DEFAULT_PROTOCOL (what a site with nothing saved yet declares), the two
`config.protocol || 1` fallbacks in uoLinkClient/uoLinkSocket -- unreachable
today, but an unset value quietly sending 1 is exactly the confusing 409 the
version check exists to prevent -- the admin form's initial value, and the
documented env default.

The boot migration is the only subtle part. schema.sql is re-run on EVERY boot,
and `protocol` is admin-editable, so a bare UPDATE would silently un-pin an
operator who had deliberately pinned an older sidecar in Admin -> Shard. It is
therefore gated on a marker row in `settings`, written after the UPDATE: the
first boot on this build migrates, every later boot is a no-op. `protocol < 3`
rather than `= 2` picks up an install still on the old default of 1, which could
not have been talking to a v2 sidecar anyway. A fresh install has no row to
update and just gets the marker plus the new column default.

Verified against the local MariaDB through ensureSchema (the production path):
2 -> 3 with the marker written and the column default now 3; pinned back to 2 by
hand, re-ran, and it STAYED 2 -- the one-shot property holds. 673 server tests,
47 client tests, client build green.

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

.env.example

@@ -117,7 +117,10 @@ BOT_INTERNAL_KEY=change-me-to-a-long-random-string
 # token). These URLs are just defaults; the admin can override them at runtime.
 UOLINK_BASE_URL=http://127.0.0.1:8080
 UOLINK_WS_URL=ws://127.0.0.1:8080/ws
-UOLINK_PROTOCOL=1
+# Wire protocol this build speaks (3 = Protocol 3.0). Only a fallback for a site
+# with nothing saved yet — the admin panel's pinned value wins — but set it lower
+# if you deliberately run an older sidecar.
+UOLINK_PROTOCOL=3
 
 # ─── Push notifications (M7) — self-hosted ntfy UnifiedPush relay ───
 # The `ntfy` compose service and the backend's push fan-out (opt-in notifications

client/src/routes/admin/views/ShardAdmin.jsx

@@ -155,7 +155,7 @@ export default function ShardAdmin() {
   const [baseUrl, setBaseUrl] = useState('')
   const [wsUrl, setWsUrl] = useState('')
   const [token, setToken] = useState('')
-  const [protocol, setProtocol] = useState(1)
+  const [protocol, setProtocol] = useState(3)
   const [enabled, setEnabled] = useState(false)
   const [busy, setBusy] = useState(false)
   const [msg, setMsg] = useState('')
@@ -172,7 +172,7 @@ export default function ShardAdmin() {
       if (!initializedRef.current) {
         setBaseUrl(c.baseUrl || '')
         setWsUrl(c.wsUrl || '')
-        setProtocol(c.protocol || 1)
+        setProtocol(c.protocol || 3)
         setEnabled(c.enabled)
         initializedRef.current = true
       }

server/db/schema.sql

@@ -359,7 +359,7 @@ CREATE TABLE IF NOT EXISTS uo_link_config (
   base_url          VARCHAR(255) NULL,
   ws_url            VARCHAR(255) NULL,
   auth_token_enc    TEXT         NULL,
-  protocol          INT          NOT NULL DEFAULT 1,
+  protocol          INT          NOT NULL DEFAULT 3,
   enabled           TINYINT(1)   NOT NULL DEFAULT 0,
   status            VARCHAR(20)  NOT NULL DEFAULT 'disconnected',
   status_detail     VARCHAR(500) NULL,
@@ -1397,3 +1397,19 @@ ALTER TABLE mobile_refresh_tokens ADD COLUMN IF NOT EXISTS last_used_at DATETIME
 -- trust token. A boolean only — the token is returned over that app→server call
 -- and never persisted here (only its sha256 lands in trusted_devices).
 ALTER TABLE mobile_auth_sessions ADD COLUMN IF NOT EXISTS trust_device TINYINT(1) NOT NULL DEFAULT 0;
+
+-- Protocol 3.0 cutover: this build speaks wire protocol 3 (world.ruleset,
+-- points.board, vendor.listing), so the pinned version an existing install
+-- carries has to move with it — a 2 against a v3 sidecar 409s every REST call
+-- and closes the WS on ws.hello. MODIFY fixes the column default for installs
+-- created before the bump (idempotent, like the other MODIFYs here).
+ALTER TABLE uo_link_config MODIFY COLUMN protocol INT NOT NULL DEFAULT 3;
+-- The row itself is admin-editable, and schema.sql runs on EVERY boot, so this
+-- must be one-shot: an operator who deliberately pins an older sidecar in
+-- Admin → Shard has to stay pinned. The marker row in `settings` is what makes
+-- it fire once — written after the UPDATE, and on a fresh install (no
+-- uo_link_config row yet) it is simply written with nothing to update.
+UPDATE uo_link_config SET protocol = 3
+  WHERE id = 1 AND protocol < 3
+    AND NOT EXISTS (SELECT 1 FROM settings WHERE `key` = 'uo_link_protocol_3_migrated');
+INSERT IGNORE INTO settings (`key`, value) VALUES ('uo_link_protocol_3_migrated', '1');

server/src/model/uoLinkConfig/uoLinkConfig.model.js

@@ -7,7 +7,10 @@
 const db = require('./uoLinkConfig.db')
 const secretBox = require('../../utils/secretBox')
 
-const DEFAULT_PROTOCOL = Number(process.env.UOLINK_PROTOCOL) || 1
+// The wire protocol this build speaks (link/sidecar/src/main.rs PROTOCOL_VERSION).
+// Only used before an admin has saved anything — the stored row wins once it exists,
+// and UOLINK_PROTOCOL still overrides for an operator running an older sidecar.
+const DEFAULT_PROTOCOL = Number(process.env.UOLINK_PROTOCOL) || 3
 
 function toSafe(row) {
   if (!row) {

server/src/utils/uoLinkClient.js

@@ -58,7 +58,7 @@ async function call(path, { method = 'GET', body } = {}) {
 
     const headers = {
       'Content-Type': 'application/json',
-      'X-UOLink-Version': String(config.protocol || 1),
+      'X-UOLink-Version': String(config.protocol || 3),
     }
     if (config.token) headers.Authorization = `Bearer ${config.token}`
 

server/src/utils/uoLinkSocket.js

@@ -197,7 +197,7 @@ async function connect() {
     return
   }
 
-  state.protocol = config.protocol || 1
+  state.protocol = config.protocol || 3
   helloSeen = false
   const url = buildUrl(config.wsUrl, config.token)