Fix search not working in drawer category views

[geoffreysisco]

Description

Drawer categories (Quick Access, Recent Files, Images, Videos, Audio,
Documents, APKs, Trash Bin) use numeric paths ("0"–"7") instead of real
filesystem directories.

BasicSearch expects a filesystem path, so searches silently returned no
results when run from these views.

When the current view uses OpenMode.CUSTOM or OpenMode.TRASH_BIN,
search now runs against the visible dataset
(MainFragmentViewModel.listElements) instead of the filesystem.

Issue tracker

Fixes #4561

Automatic tests

• Added test cases

Manual tests

• Done

Device: Pixel 9 Pro (emulator)
OS: Android 16 (API 36)
Rooted: No
Build: debug

Verified search in:

• Recent Files
• Images
• Videos
• Audio
• Documents
• APKs
• Trash Bin
• Normal directory view

Could not verify:

• Quick Access (no items available to search)

Build tasks success

Successfully running following tasks locally:

• ./gradlew assembleDebug
• ./gradlew spotlessCheck

[VishnuSanal]

awesome, LGTM 🚀 thanks for contributing to amaze :)

[geoffreysisco]

Adding before/after recordings for clarity:

Before (search fails in drawer/category views)

After (search uses visible dataset)

Repro:

1. Open a drawer category (e.g. Images)
2. Tap search
3. Enter test
4. Press search

Expected:
Matching visible files are returned

Actual (before):
No results returned

[EmmanuelMess]

This should follow the structure of the normal search, and launch to a different coroutine. It also misses the other search modes (index and deep), which should probably be disabled completely in some CUSTOM modes.

[geoffreysisco]

Thanks, that makes sense.

I see the issue — this is currently handling CUSTOM / TRASH_BIN inline inside basicSearch() instead of following the existing search structure.

I’ll revisit this and rework it to align more closely with the normal search pattern.

[geoffreysisco]

I pushed an updated implementation that follows the normal search structure more closely.

Instead of handling CUSTOM / TRASH_BIN inline inside basicSearch(), these modes now use a dedicated FileSearch implementation (ListElementsSearch) while keeping the existing coroutine / LiveData search pipeline intact.

Indexed and deep search escalation are also disabled for these views since they do not support filesystem-backed search modes.

Added focused ListElementsSearch unit tests covering:

• matching visible drawer items
• filtering back/header entries
• no-result behavior

Quick Access remains unverified (no items available to test), as noted in the original description.