improve reasoning toggle tests and refactor model capability checks

src/services/webSearchService.js

@@ -106,14 +106,16 @@ export function buildWebSearchQueries(message, decision = decideWebSearch(messag
 }
 
 /** Retrieve before generation; only try a second date query when the first has no usable evidence. */
-export async function retrieveWebSearch(message, provider, {signal, onSearching = () => {}} = {}) {
+export async function retrieveWebSearch(message, provider, {signal, onSearching = () => {}, referenceText = ""} = {}) {
     const decision = decideWebSearch(message);
     if (!decision.shouldSearch) return {decision, state: "skipped", queries: [], candidates: [], sources: null};
     onSearching();
     const queries = [];
     let candidates = [];
     let sources = [];
-    for (const query of buildWebSearchQueries(message, decision)) {
+    // Image evidence may clarify "is this accurate?"; it must never alter the user's tool decision.
+    const searchMessage = referenceText ? `${message} ${referenceText}` : message;
+    for (const query of buildWebSearchQueries(searchMessage, decision)) {
         queries.push(query);
         try {
             const results = await provider.search(query, {
@@ -125,7 +127,7 @@ export async function retrieveWebSearch(message, provider, {signal, onSearching
             const merged = [...results, ...candidates].sort((a, b) =>
                 Number(Boolean(b?.snippet || b?.content)) - Number(Boolean(a?.snippet || a?.content)));
             candidates = normalizeSearchCandidates(merged, MAX_CANDIDATES * 2);
-            sources = selectSearchResults(message, candidates, decision);
+            sources = selectSearchResults(searchMessage, candidates, decision);
             if (sources.length) break;
         } catch (error) {
             if (signal?.aborted || queries.length === 1) throw error;