Maintain multi-line content when switching between search and Duck.ai

[joshliebe]

Task/Issue URL: https://app.asana.com/1/137249556945/project/488551667048375/task/1210498774626389?focus=true

Description

• Makes the search input field multi-line but still submits when hitting enter on the keyboard.
• Decreases the transition animation from the default 300ms to 200ms.
• Adds a clear text button.
• Adds layout change animations.

Steps to test this PR

• Enable Duck.ai PoC
• Go to Duck.ai tab
• Enter some multi-line text
• Switch to search tab
• Verify that the text is multi-line
• Hit enter
• Verify that the search text is submitted

[joshliebe]

• Maintain multi-line content when switching between search and Duck.ai #6219 👈 (View in Graphite)
• develop

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[Copilot]

Pull Request Overview

The PR ensures that multi-line content is preserved when switching between the search and Duck.ai tabs, adds a clear-text button, and improves layout animations and transitions.

• Switches the omnibar’s EditText to a custom SearchInterstitialEditText to handle multi-line input and Enter submission.
• Adds a clear-text ImageView with animated layout changes in the omnibar layout.
• Hooks up transition duration constant in the interstitial activity and tweaks animation timing in the omnibar.

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 3 comments.

File	Description
view_duck_chat_omnibar.xml	Enabled animateLayoutChanges, swapped in custom EditText, and added clear-text button.
SearchInterstitialEditText.kt	Introduced custom EditText that intercepts Enter for submission.
SearchInterstitialActivity.kt	Applied a shared‐element transition duration constant (200ms).
DuckChatOmnibarLayout.kt	Wired up clear button, updated input behavior for multi-line, adjusted animation duration and max lines.

Comments suppressed due to low confidence (1)

duckchat/duckchat-impl/src/main/java/com/duckduckgo/duckchat/impl/ui/DuckChatOmnibarLayout.kt:150

• The new clear-text visibility behavior and multi-line retention logic need unit or UI tests to ensure they work as expected when switching tabs, entering text, and tapping the clear button.

duckChatClearText.isVisible = !s.isNullOrEmpty()

[aitorvs]

LGTM
Added few nit comments and also tested copy/pasting text that already contains line breaks in the search mode to ensure it doesn't trigger the search