fix(patch): cherry-pick e4315b3 to release/v0.46.0-preview.0-pr-27645 to patch version v0.46.0-preview.0 and create version 0.46.0-preview.1

[gemini-cli-robot]

This PR automatically cherry-picks commit e4315b3 to patch version v0.46.0-preview.0 in the preview release to create version 0.46.0-preview.1.

[github-actions]

📊 PR Size: size/L

• Lines changed: 505
• Additions: +463
• Deletions: -42
• Files changed: 24

[github-actions]

Size Change: +1.4 kB (0%)

Total Size: 33.9 MB

Filename	Size	Change
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./bundle/chunk-WQFNLAK2.js	49.2 kB	+49.2 kB (new file)	🆕
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./bundle/core-IKXLUZDD.js	49.7 kB	+49.7 kB (new file)	🆕
./bundle/devtoolsService-ZT25IFLL.js	28 kB	+28 kB (new file)	🆕
./bundle/gemini-7R6SHXJG.js	589 kB	+589 kB (new file)	🆕
./bundle/interactiveCli-7WNRSVSQ.js	1.3 MB	+1.3 MB (new file)	🆕
./bundle/liteRtServerManager-TNAUXVSV.js	2.08 kB	+2.08 kB (new file)	🆕
./bundle/oauth2-provider-FZCTZEFZ.js	9.12 kB	+9.12 kB (new file)	🆕

ℹ️ View Unchanged

Filename	Size	Change
./bundle/bundled/third_party/index.js	8 MB	0 B
./bundle/chunk-34MYV7JD.js	2.45 kB	0 B
./bundle/chunk-5AUYMPVF.js	858 B	0 B
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./bundle/cleanup-JHULX5RL.js	0 B	-902 B (removed)	🏆
./bundle/devtools-V7NE4CQA.js	696 kB	0 B
./bundle/events-XB7DADIJ.js	418 B	0 B
./bundle/examples/hooks/scripts/on-start.js	188 B	0 B
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./bundle/gemini.js	5.38 kB	0 B
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./bundle/src-LG4OHBW7.js	233 kB	0 B
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./bundle/start-37KVQDDB.js	0 B	-622 B (removed)	🏆
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./bundle/worker/worker-entry.js	361 kB	0 B
./bundle/cleanup-J2DLX3PZ.js	902 B	+902 B (new file)	🆕
./bundle/start-3XZO2HTT.js	622 B	+622 B (new file)	🆕

_{compressed-size-action}

[DavidAPierce]

LGTM

[gemini-code-assist]

Summary of Changes

Hello, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request cherry-picks a commit to patch the preview release, introducing refined model selection logic for Gemini 3.5 Flash. It updates core configuration services, routing strategies, and UI components to ensure consistent model resolution and display, while also synchronizing schema definitions and expanding test coverage for the new model promotion logic.

Highlights

• Model Configuration Updates: Integrated the useGemini3_5Flash flag across CLI and core components to refine model selection and routing logic.
• Routing Strategy Enhancements: Updated approval, classifier, and numerical routing strategies to incorporate hasGemini35FlashGAAccess checks for improved model resolution.
• UI and Display Improvements: Updated ModelDialog and ModelStatsDisplay components to support new model resolution logic and ensure consistent display strings.
• Schema and Test Coverage: Synchronized settings.schema.json with new model resolution conditions and added comprehensive tests for the updated routing and promotion logic.

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[gemini-code-assist]

Code Review

This pull request introduces support for Gemini 3.5 Flash GA model routing and promotion across the CLI and core packages. It adds configuration options, updates model resolution and routing strategies (such as classifier and approval mode strategies), and integrates getDisplayString to map legacy model names (like gemini-3-flash) to gemini-3.5-flash in the UI. A review comment correctly identified a missing import of getDisplayString in ModelStatsDisplay.tsx which would cause a compilation error.