fix: queryCondition now matches by email OR userId

Previously when existingUserId was provided, it only searched by userId,
ignoring email. This meant invites created by email weren't found when
the invited user already existed. Now we OR together all conditions.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: jchris

dashboard/backend/sql/sql-helper.ts

@@ -1,5 +1,5 @@
 import { Queryable, QueryUser } from "@fireproof/core-protocols-dashboard";
-import { and, eq, or } from "drizzle-orm/sql/expressions";
+import { eq, or } from "drizzle-orm/sql/expressions";
 import { SQLiteColumn } from "drizzle-orm/sqlite-core";
 
 export function toUndef(v: string | null | undefined): string | undefined {
@@ -28,42 +28,42 @@ export function queryCondition(
     readonly queryProvider: SQLiteColumn;
   },
 ) {
+  // Build conditions for matching by userId, email, or nick
+  // We OR together all possible matches so invites can be found by email even when userId is provided
+  const conditions = [] as ReturnType<typeof or>[];
+
   if (query.existingUserId) {
-    return eq(table.userId, query.existingUserId);
+    conditions.push(eq(table.userId, query.existingUserId));
   }
 
   const str = query.byString?.trim();
   if (str) {
     const byEmail = queryEmail(str);
     const byNick = queryNick(str);
-    const conditions = [] as ReturnType<typeof or>[];
     if (byEmail) {
       conditions.push(eq(table.queryEmail, byEmail));
     }
     if (byNick) {
       conditions.push(eq(table.queryNick, byNick));
     }
     conditions.push(eq(table.userId, str));
-    return or(...conditions);
   }
 
   const byEmail = queryEmail(query.byEmail);
   const byNick = queryNick(query.byNick);
-  let where: ReturnType<typeof and> = eq(table.userId, Math.random() + "");
-  if (byEmail && byNick && query.andProvider) {
-    where = and(eq(table.queryEmail, byEmail), eq(table.queryNick, byNick), eq(table.queryProvider, query.andProvider));
-  } else if (byEmail && byNick) {
-    where = and(eq(table.queryEmail, byEmail), eq(table.queryNick, byNick));
-  } else if (byEmail && query.andProvider) {
-    where = and(eq(table.queryEmail, byEmail), eq(table.queryProvider, query.andProvider));
-  } else if (byNick && query.andProvider) {
-    where = and(eq(table.queryNick, byNick), eq(table.queryProvider, query.andProvider));
-  } else if (byEmail) {
-    where = eq(table.queryEmail, byEmail);
-  } else if (byNick) {
-    where = eq(table.queryNick, byNick);
+  if (byEmail) {
+    conditions.push(eq(table.queryEmail, byEmail));
+  }
+  if (byNick) {
+    conditions.push(eq(table.queryNick, byNick));
   }
-  return where;
+
+  if (conditions.length === 0) {
+    // No valid conditions - return a condition that matches nothing
+    return eq(table.userId, Math.random() + "");
+  }
+
+  return or(...conditions);
 }
 
 export function queryNick(nick?: string): string | undefined {