fix(ui): link every route to its handler, however many files they span (#1975) (#1993)

buildRoutes looked up node ids only for the first 60 distinct handler
files, one getNodesInFile query each, so every later row went out with
handlerId null and the viewer called the handler "not in the index". Load
the nodes of every handler file in one chunked query instead
(getNodesInFiles), which also drops the per-file query the cap existed
to bound.

Co-authored-by: danusha2345 <ewidusoc498@gmail.com>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

src/ui-server/api/routes.ts

@@ -79,9 +79,6 @@ export function splitRouteName(url: string): { method: string | null; path: stri
   return { method: head.toUpperCase(), path: url.slice(space + 1).trimStart() };
 }
 
-/** Distinct handler files we will resolve node ids for. */
-const MAX_HANDLER_FILES = 60;
-
 /**
  * The engine needs three surviving rows to call a project routed, and applies
  * `limit` before that test — so anything below three is a question that cannot
@@ -111,18 +108,16 @@ export function buildRoutes(cg: CodeGraph, query: URLSearchParams): WireRoutes {
   const truncated = manifest.entries.length > limit;
   const rows = manifest.entries.slice(0, limit);
 
-  // One `getNodesInFile` per distinct handler file — typically one or two, and
-  // capped so a project that scatters handlers across hundreds of files cannot
-  // turn one request into hundreds of queries.
-  const handlerFiles = [...new Set(rows.map((e) => e.handlerFile))].slice(0, MAX_HANDLER_FILES);
+  // Every row's handler file in one batched query, so a project that scatters
+  // handlers across hundreds of files still costs one query per chunk, and no
+  // row past a cap is reported as "not in the index" (#1975).
+  const handlerFiles = [...new Set(rows.map((e) => e.handlerFile))];
   const byFileLineName = new Map<string, string>();
-  for (const file of handlerFiles) {
-    for (const node of cg.getNodesInFile(file)) {
-      // Keyed on what the manifest actually knows: file, line and name. Two
-      // symbols can share a line (a decorator and its method); the name breaks
-      // the tie, and a miss simply leaves that entry unlinked.
-      byFileLineName.set(`${node.filePath} ${node.startLine} ${node.name}`, node.id);
-    }
+  for (const node of cg.getNodesInFiles(handlerFiles)) {
+    // Keyed on what the manifest actually knows: file, line and name. Two
+    // symbols can share a line (a decorator and its method); the name breaks
+    // the tie, and a miss simply leaves that entry unlinked.
+    byFileLineName.set(`${node.filePath} ${node.startLine} ${node.name}`, node.id);
   }
 
   const entries: WireRoute[] = rows.map((entry) => ({