fix: prevent crash on _activeTheme access before ThemeManager initialization

[Copilot]

After prolonged inactivity, Android may call onCreateInputView() before ThemeManager.init() completes — the init runs in a coroutine suspended until Rime is ready, creating a race where _activeTheme (lateinit) is accessed uninitialized, crashing with UninitializedPropertyAccessException.

Changes

• ThemeManager — expose isInitialized: Boolean via ::_activeTheme.isInitialized to allow safe pre-init checks

• TrimeInputMethodService — add inputViewPending: Boolean flag; guard onCreateInputView() to bail early (returning null) if theme isn't ready yet, and after ThemeManager.init() completes in the async Rime-ready block, trigger deferred replaceInputViews() if the flag is set:

override fun onCreateInputView(): View? {
    if (!ThemeManager.isInitialized) {
        inputViewPending = true
        return null
    }
    replaceInputViews(ThemeManager.activeTheme)
    return null
}

// inside rime.runOnReady { ... }
ThemeManager.init(resources.configuration)
ThemeManager.addOnChangedListener(onThemeChangeListener)
ColorManager.addOnChangedListener(onColorChangeListener)
if (inputViewPending) {
    inputViewPending = false
    replaceInputViews(ThemeManager.activeTheme)
}

• Fixes 切换到 trime 时奔溃：_activeTheme 未初始化 #2058

[Copilot]

Pull request overview

Prevents an UninitializedPropertyAccessException crash when Android calls onCreateInputView() before ThemeManager.init() finishes (e.g., after long inactivity), by adding an explicit initialization check and deferring input-view creation until the theme is ready.

Changes:

• Add ThemeManager.isInitialized to safely detect whether _activeTheme has been set.
• Guard TrimeInputMethodService.onCreateInputView() to return early when the theme isn’t ready and set a pending flag.
• After ThemeManager.init() completes in the Rime-ready block, trigger a deferred replaceInputViews() if input view creation was previously requested.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
app/src/main/java/com/osfans/trime/ime/core/TrimeInputMethodService.kt	Defers input-view creation until theme initialization completes, then replays the creation if needed.
app/src/main/java/com/osfans/trime/data/theme/ThemeManager.kt	Exposes a safe isInitialized check for _activeTheme to avoid lateinit access crashes.

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