Add Duck ai usage warning debug screen

[YoussefKeyrouz]

Task/Issue URL: https://app.asana.com/1/137249556945/project/1212810093780571/task/1218737010316389?focus=true
Tech Design URL (if applicable): https://app.asana.com/1/137249556945/project/72649045549333/task/1218250488028912?focus=true
API Proposals URL(s) (if applicable):

Description

Stacked PR 2

Adds an internal-only "Usage Warnings" screen under the Duck.ai dev tools. It lists the high-usage messages dismissed by the user and lets a tester reset those dismissals.

This is the home for the usage-limit debug controls coming with the next slices.

Steps to test this PR

Entry

• Internal build. Settings > Developer settings > Duck.ai. A "Usage Warnings" row is listed and opens the screen

Dismissals

• Enable duckAiUsageWarnings in Feature Flag Inventory
• Login to an account with PRO subscription (Access to Opus)
• Fresh state: "Dismissed high-usage models" says "None" and the reset button is disabled
• Select Opus 4.8 in Duck.ai mode, dismiss the notice with the X.
• Return to the dev screen: The row lists claude-opus-4-8 and the button is enabled
• Tap "Reset high-usage dismissals".
• Open the native input with Opus 4.8 selected. The notice is back

UI changes

[claude]

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[joshliebe]

Tested, works as expected ✅🚀

[malmstein]

LGTM.

[malmstein]

suggestion: worth wrapping contentLayout in a ScrollView now, since the description says this screen is where the usage limit controls land next. activity_duck_ai_dev.xml already scrolls for the same reason.