FEAT: Add availabilityService (#81)

* auto and fallback work

* test fixes

* fixes

* Show model dialog even if there's no more fallback option

* fix tests

* fix failing test

* disable showInDialog for model in settings

* revert package-lock.json

* remove dup line

---------

Co-authored-by: Sehoon Shon <sshon@google.com>

packages/cli/src/ui/components/Footer.tsx

@@ -7,7 +7,11 @@
 import type React from 'react';
 import { Box, Text } from 'ink';
 import { theme } from '../semantic-colors.js';
-import { shortenPath, tildeifyPath } from '@google/gemini-cli-core';
+import {
+  shortenPath,
+  tildeifyPath,
+  getDisplayString,
+} from '@google/gemini-cli-core';
 import { ConsoleSummaryDisplay } from './ConsoleSummaryDisplay.js';
 import process from 'node:process';
 import { ThemedGradient } from './ThemedGradient.js';
@@ -145,7 +149,7 @@ export const Footer: React.FC = () => {
         <Box alignItems="center" justifyContent="flex-end">
           <Box alignItems="center">
             <Text color={theme.text.accent}>
-              {model}
+              {getDisplayString(model)}
               {!hideContextPercentage && (
                 <>
                   {' '}

packages/cli/src/ui/components/ProQuotaDialog.tsx

@@ -13,6 +13,8 @@ import {
   DEFAULT_GEMINI_FLASH_LITE_MODEL,
   DEFAULT_GEMINI_FLASH_MODEL,
   DEFAULT_GEMINI_MODEL,
+  FLASH_PREVIEW_MODEL_REVERT_BEFORE_MERGE,
+  PREVIEW_GEMINI_FLASH_MODEL,
   UserTierId,
 } from '@google/gemini-cli-core';
 
@@ -44,7 +46,9 @@ export function ProQuotaDialog({
   // flash and flash lite don't have options to switch or upgrade.
   if (
     failedModel === DEFAULT_GEMINI_FLASH_MODEL ||
-    failedModel === DEFAULT_GEMINI_FLASH_LITE_MODEL
+    failedModel === DEFAULT_GEMINI_FLASH_LITE_MODEL ||
+    failedModel === PREVIEW_GEMINI_FLASH_MODEL ||
+    failedModel === FLASH_PREVIEW_MODEL_REVERT_BEFORE_MERGE
   ) {
     items = [
       {