fix: address gemini native and route coverage regressions

src/web/pages/helpers/modelTesterSession.test.ts

@@ -9,6 +9,7 @@ import {
   buildApiPayload,
   buildEmbeddingsRequestEnvelope,
   buildFileUploadRequestEnvelope,
+  buildGeminiNativeConversationProxyEnvelope,
   buildRawProxyRequestEnvelope,
   buildSearchRequestEnvelope,
   collectModelTesterModelNames,
@@ -321,6 +322,39 @@ describe('modelTesterSession', () => {
     });
   });
 
+  it('builds gemini native proxy envelope without loading assistant placeholders', () => {
+    const payload = buildGeminiNativeConversationProxyEnvelope(
+      [
+        { id: 'u1', role: 'user', content: 'hello', createAt: 1 },
+        { id: 'a1', role: 'assistant', content: '', createAt: 2, status: MESSAGE_STATUS.LOADING },
+        { id: 'a2', role: 'assistant', content: 'partial', createAt: 3, status: MESSAGE_STATUS.INCOMPLETE },
+        { id: 'a3', role: 'assistant', content: 'done', createAt: 4, status: MESSAGE_STATUS.COMPLETE },
+      ],
+      {
+        ...DEFAULT_INPUTS,
+        model: 'gemini-2.5-pro',
+        protocol: 'gemini',
+        systemPrompt: 'system text',
+        stream: true,
+      },
+      {
+        ...DEFAULT_PARAMETER_ENABLED,
+        max_tokens: true,
+      },
+    );
+
+    expect(payload.path).toBe('/gemini/v1beta/models/gemini-2.5-pro:generateContent?alt=sse');
+    expect(payload.jobMode).toBe(false);
+    expect(payload.jsonBody).toEqual({
+      systemInstruction: { parts: [{ text: 'system text' }] },
+      contents: [
+        { role: 'user', parts: [{ text: 'hello' }] },
+        { role: 'model', parts: [{ text: 'done' }] },
+      ],
+      generationConfig: { temperature: 0.7, maxOutputTokens: 4096 },
+    });
+  });
+
   it('serializes conversation file parts into openai and responses payloads', () => {
     const message = {
       id: 'u1',

src/web/pages/helpers/modelTesterSession.ts

@@ -949,6 +949,19 @@ export const buildConversationRequestEnvelope = (
   jsonBody: buildConversationJsonBody(messages, inputs, parameterEnabled),
 });
 
+export const buildGeminiNativeConversationProxyEnvelope = (
+  messages: ChatMessage[],
+  inputs: ModelTesterInputs,
+  parameterEnabled: ParameterEnabled,
+): TesterProxyEnvelope => {
+  const envelope = buildConversationRequestEnvelope(messages, { ...inputs, protocol: 'gemini' }, parameterEnabled);
+  return {
+    ...envelope,
+    path: `/gemini${envelope.path}${inputs.stream ? '?alt=sse' : ''}`,
+    jobMode: false,
+  };
+};
+
 export const buildEmbeddingsRequestEnvelope = (
   inputText: string,
   inputs: ModelTesterInputs,

src/web/pages/helpers/routeListVisibility.ts

@@ -16,6 +16,12 @@ export function buildVisibleRouteList<T extends RouteListVisibilityItem>(
   isExactModelPattern: (pattern: string) => boolean,
   matchesModelPattern: (model: string, pattern: string) => boolean,
 ): T[] {
+  const exactModelNames = new Set(
+    routes
+      .filter((route) => isExactModelPattern(route.modelPattern))
+      .map((route) => (route.modelPattern || '').trim())
+      .filter(Boolean),
+  );
   const coveringGroups = routes.filter((route) => (
     route.enabled
     && !isExactModelPattern(route.modelPattern)
@@ -33,6 +39,7 @@ export function buildVisibleRouteList<T extends RouteListVisibilityItem>(
 
     return !coveringGroups.some((groupRoute) => (
       groupRoute.id !== route.id
+      && !exactModelNames.has((groupRoute.displayName || '').trim())
       && matchesModelPattern(exactModel, groupRoute.modelPattern)
     ));
   });

src/web/pages/helpers/routeMissingTokenHints.ts

@@ -3,6 +3,10 @@ export type MissingTokenModelAccount = {
   username: string | null;
   siteId: number;
   siteName: string;
+  missingGroups?: string[];
+  requiredGroups?: string[];
+  availableGroups?: string[];
+  groupCoverageUncertain?: boolean;
 };
 
 export type MissingTokenModelsByName = Record<string, MissingTokenModelAccount[]>;
@@ -29,11 +33,21 @@ export function normalizeMissingTokenModels(
       if (!account || !Number.isFinite(account.accountId)) continue;
       const accountName = (account.username || '').trim();
       const siteName = String(account.siteName || '').trim();
+      const normalizeLabels = (labels: unknown): string[] => Array.isArray(labels)
+        ? Array.from(new Set(labels
+          .map((label) => String(label || '').trim())
+          .filter(Boolean)))
+          .sort((a, b) => a.localeCompare(b, undefined, { sensitivity: 'base' }))
+        : [];
       accountMap.set(account.accountId, {
         accountId: account.accountId,
         username: accountName || null,
         siteId: account.siteId,
         siteName,
+        ...(normalizeLabels(account.missingGroups).length > 0 ? { missingGroups: normalizeLabels(account.missingGroups) } : {}),
+        ...(normalizeLabels(account.requiredGroups).length > 0 ? { requiredGroups: normalizeLabels(account.requiredGroups) } : {}),
+        ...(normalizeLabels(account.availableGroups).length > 0 ? { availableGroups: normalizeLabels(account.availableGroups) } : {}),
+        ...(account.groupCoverageUncertain === true ? { groupCoverageUncertain: true } : {}),
       });
     }
     if (accountMap.size > 0) {