Refactor: Update schema to use valueMap instead of valueList, clarify data model.

[gspencergoog]

Description

This PR updates the A2UI schema and examples to replace and deprecate valueList with valueMap for representing map-like data structures within the data model. It updates the samples as well as the evals and web examples to match.

Changes:

• Schema Update (a2ui_schema.py):
  • Replaced the valueList property in the DataModelUpdate contents definition with valueMap.
  • valueMap is defined as an array of objects, where each object has a key (string) and one of the value* properties (valueString, valueNumber, valueBoolean).
  • Updated the description for path to clarify that / can be used to replace the entire data model.
• Example Update (a2ui_examples.py):
  • Modified the CONTACT_UI_EXAMPLES to use valueMap to represent the list of contacts.
  • Each contact is now an entry in the valueMap array, keyed by a unique identifier (e.g., "contact1", "contact2").
  • The properties of each contact (name, phone, email, etc.) are represented as entries in a nested valueMap.
• Type Update (types.ts):
  • Updated the DataModelUpdate interface in the web library to reflect the schema change from valueList to valueMap.

Reasoning:

Using valueMap provides a more explicit and structured way to represent key-value pairs, improving clarity and consistency in how map-like data is handled within the A2UI framework. This change aligns the examples and types with the updated schema definition. Also, LLMS suck at dealing with list indices, so this helps them use string keys instead. They can always still use "1" and "2" as keys, but the examples help encourage strings.

Eval results with new schema (N=2)

Evaluation Summary

Model: gemini-2.5-flash (thinking: 0)

Prompt Name	Avg Latency (ms)	Failed Runs	Tool Error Runs
deleteSurface	2254
dogBreedGenerator	8144
loginForm	2912
productGallery	4578
productGalleryData	2889
settingsPage	5730
dataModelUpdate	2370
uiRoot	2305
animalKingdomExplorer	19135	1 / 2
recipeCard	4805	2 / 2
musicPlayer	4409	2 / 2
weatherForecast	7828
surveyForm	3590
flightBooker	3448
dashboard	4687
contactCard	5565
calendarEventCreator	3731
checkoutPage	3783
socialMediaPost	4485
eCommerceProductPage	6854
interactiveDashboard	5017
travelItinerary	8719

Total failed runs: 5 / 44

Model: gemini-2.5-flash-lite (thinking: 0)

Prompt Name	Avg Latency (ms)	Failed Runs	Tool Error Runs
deleteSurface	2115
dogBreedGenerator	5591	2 / 2
loginForm	3210
productGallery	3054
productGalleryData	2619
settingsPage	3983
dataModelUpdate	2346
uiRoot	2253
animalKingdomExplorer	12091
recipeCard	4606	2 / 2
musicPlayer	3922
weatherForecast	3734
surveyForm	4025
flightBooker	3918
dashboard	3733	1 / 2
contactCard	3049
calendarEventCreator	3905
checkoutPage	4146
socialMediaPost	4275
eCommerceProductPage	5567
interactiveDashboard	4819
travelItinerary	8552

Total failed runs: 5 / 44

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Overall Summary

• Number of tool error runs: 0 / 88
• Number of runs with any failure (tool error or validation): 10 / 88
• Models with at least one failure: gemini-2.5-flash-lite (thinking: 0), gemini-2.5-flash (thinking: 0)

[dmandar]

PTAL at comment