Add search to settings

[Dyltom]

Closes #824

Summary

• Moves the Settings search control into the Settings header so the icon sits at the top right and expands in place.
• Uses the requested placeholder text: Search by section name or parameter.
• Filters by section title, parameter labels, selected dropdown values, text/numeric values, and connection fields while excluding command-button/link labels.
• Expands and highlights matching sections, and shows the centered No results found empty state.

Validation

• git diff --check
• qmllint ui/view/Settings.qml ui/view/controls/SettingsFoldable.qml (only existing Beam.Wallet import/generated-type warnings when run outside the built app context)
• cmake --build build-verify --target beam-wallet-ui --parallel 4
• Manual macOS test with a throwaway empty wallet for show, privacy, bitcoin, and a no-match query.

Test video

• https://github.com/Dyltom/beam-ui/releases/download/pr-1244-settings-search-video-v2-20260513/beam-settings-search-v2.mp4

[Maxnflaxl]

Hi, the How To Build doc can be found here: https://github.com/BeamMW/beam-ui/wiki/How-to-build-Beam-desktop-UI

If you run into issues with the setup, you can join https://t.me/beamdevsupport and we'll assist you.

Please make sure that everything works as expected.

[Dyltom]

Thanks, I followed the build doc and verified this locally.

Checks run:

• git diff --check origin/master...HEAD
• qmllint ui/view/Settings.qml ui/view/controls/SettingsFoldable.qml (only existing/generated-type import warnings when run outside the built app context)
• CMake configure with Qt 6.11, OpenSSL 3, and local Boost 1.75 per the wiki
• cmake --build build-boost175 --target beam-wallet-ui --parallel 4

Build passed and produced build/Beam Wallet.app. I also added the generated i18n entries for the two new search strings and force-pushed commit 6e66f80.

[Maxnflaxl]

Good that it builds, but none of these checks say that you actually tested the feature, please record a short video testing the feature.

[Dyltom]

Recorded a short feature test video here: beam-settings-search.mp4\n\nTested locally on macOS with a throwaway empty wallet. The video shows:\n- Settings search opened from the Settings page\n- privacy filtering to and expanding the Privacy section\n- bitcoin filtering to and expanding the Bitcoin settings\n- a no-match query showing "No settings found"\n- clearing search restoring the full settings list

[Maxnflaxl]

Please take a look at the issue again w.r.t. the position and behavior of the search icon and the search bar as well as the no results found case.
The video does not match the position and behavior outlined in the issue.

If you use AI to write the code, at least answer me yourself.\n