Surface raw RCON reply bytes + Probe RCON button

"unparseable reply (34 bytes)" told us Plutonium answered but hid the
actual bytes, forcing another guess-and-check round. rconStatusResult
now emits a formatRawReply() hex + ASCII dump of the raw UDP payload on
every bad-reply, persisted in a new last_reply_snippet column so it
survives page loads.

Wrong-password detection widens beyond the "bad rcon" phrasing to
"(bad|invalid|wrong)…(rcon|password|pass)"; print-body replies that
don't match get their first non-header line surfaced verbatim so at
least *some* server-supplied text reaches the UI.

Probe RCON button (POST /api/servers/[name]/probe-rcon) fires the same
code path as the periodic sweep on demand, cuts the RCON iteration loop
from 30s per attempt to sub-second, and refreshes the header/roster/
health when it succeeds. Snippet <details> auto-opens on bad-reply so
the bytes are one glance away.

migrateServers() picks up the new column automatically via the
introspection path added last commit.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/lib/server/db/index.ts

@@ -24,7 +24,8 @@ const SERVERS_COLUMNS: Array<{ name: string; ddl: string }> = [
     { name: 'last_gametype', ddl: 'ALTER TABLE servers ADD COLUMN last_gametype TEXT' },
     { name: 'last_roster', ddl: 'ALTER TABLE servers ADD COLUMN last_roster TEXT' },
     { name: 'last_seen_at', ddl: 'ALTER TABLE servers ADD COLUMN last_seen_at TEXT' },
-    { name: 'last_error', ddl: 'ALTER TABLE servers ADD COLUMN last_error TEXT' }
+    { name: 'last_error', ddl: 'ALTER TABLE servers ADD COLUMN last_error TEXT' },
+    { name: 'last_reply_snippet', ddl: 'ALTER TABLE servers ADD COLUMN last_reply_snippet TEXT' }
 ];
 
 function migrateServers(handle: Database.Database): void {

src/lib/server/db/schema.sql

@@ -18,6 +18,7 @@ CREATE TABLE IF NOT EXISTS servers (
     last_roster      TEXT,                                -- JSON array of RconPlayer
     last_seen_at     TEXT,                                -- ISO ts of last successful RCON reply
     last_error       TEXT,                                -- last RCON failure reason (cleared on success)
+    last_reply_snippet TEXT,                              -- hex+ASCII of last bad-reply UDP payload
     created_at       TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ','now'))
 );