[Feature] Render solely the visible tasks.

[roke-julian-lockhart]

My Rationale

The amount of time that is required to render the task list slows in proportion to the amount of visible tasks. An example is that 5 702 tasks require PT1M43S to render:

screen-20260614-190914.mp4

Desired Solutions

Consequently, solely render visible tasks.

Considered Alternatives

Provide an accurate enumeration progress indicator.

Additional Context

nextcloud/tasks/issues/2417 is similar.

My Environment

• Hardware

  1. Details

     #!/usr/bin/env pwsh
     $Object = [Ordered]@{}
     @(
     	'ro.product.brand'
     	'ro.build.product'
     ) | ForEach-Object {
     	$Value = (adb shell "getprop $_").Trim()
     	If ($Value) {
     		$Int64 = 0L
     		$Object[$_] =
     			If ([Long]::TryParse($Value, [Ref]$Int64)) {
     				$Int64
     			} Else {
     				$Value
     			}
     	}
     }
     $Object |
     	ConvertTo-Json -Compress |
     	yq -P

  2. ro.product.brand: Fairphone
     ro.build.product: FP5

• OS

  1. Details

     #!/usr/bin/env pwsh
     $Object = [Ordered]@{}
     @(
     	'ro.build.display.id'
     	'ro.build.fingerprint'
     	'ro.build.version.sdk'
     	'ro.build.version.sdk_full'
     ) | ForEach-Object {
     	$Value = (adb shell "getprop $_").Trim()
     	If ($Value) {
     		$Int64 = 0L
     		$Object[$_] =
     			If ([Long]::TryParse($Value, [Ref]$Int64)) {
     				$Int64
     			} Else {
     				$Value
     			}
     	}
     }
     $Object |
     	ConvertTo-Json -Compress |
     	yq -P

  2. ro.build.display.id: FP5.VT2R.C.095.20260423
     ro.build.fingerprint: Fairphone/FP5/FP5:15/AQ3A.240912.001/VT2R:user/release-keys
     ro.build.version.sdk: 35

• JTX Board

  1. Details

     #!/usr/bin/env pwsh
     $Package = 'at.techbee.jtx'
     $DumpSys = adb shell "dumpsys package $Package"
     $Object = [Ordered]@{}
     @{
     	versionCode = 'versionCode=(\d+)'
     	versionName = 'versionName=([^\s]+)'
     }.GetEnumerator() | ForEach-Object {
     	$Match = [RegEx]::Match(
     		$DumpSys,
     		$_.Value,
     		[System.Text.RegularExpressions.RegexOptions]::Multiline
     	)
     	If ($Match.Success) {
     		$Value = $Match.Groups[1].Value
     		$Int64 = 0L
     		$Object[$_.Key] =
     			If ([Long]::TryParse($Value, [Ref]$Int64)) {
     				$Int64
     			} Else {
     				$Value
     			}
     	}
     }
     $Object.installer = (
     	adb shell 'pm list packages -i' |
     		Select-String "^package:$([RegEx]::Escape($Package)) " |
     		ForEach-Object {
     			$_ -replace '^.*installer='
     		}
     )
     $Object |
     	ConvertTo-JSON -Compress |
     	yq -P

  2. versionCode: 216000015
     versionName: 2.16.00.ose
     installer: com.looker.droidify