Release 0.0.5-beta.1: crisp adjustable haptics, key sound fix, 中/英 on the right

[Slacker-LLC]

Summary

• Key haptics drive the vibrator directly: PRIMITIVE_CLICK on API 30+, EFFECT_CLICK on API 29, a 20 ms one-shot before that, tagged as touch feedback. Since Android 14 QPR3 KEYBOARD_TAP plays at a fixed, often low keyboard amplitude; commercial IMEs drive the vibrator themselves.
• New 震动强度 slider (10–100%, default 100%) in preferences and on the keyboard settings panel's first screen; it previews while dragged and is included in the user-data archive.
• Fix key sound: playSoundEffect(effect, volume) plays even when the system "touch sounds" setting is off, as AOSP LatinIME does.
• 26-key bottom row: 中/英 and ，。 swap, so it reads 123 | ，。 | 空格 | 中/英 | 确定 in Chinese and English.
• Remove the undo after swipe-up clear (gesture, banner and gateway snapshot); the toolbar undo button stays.
• Split 关于与数据 into 关于 (privacy, diagnostics, version) and 数据管理 (export/import, voice word lists, uninstall note). Tools panel drops 语音输入 and 切换键盘 and gains 数据管理.

Test plan

• testDebugUnitTest 374/374, lintDebug with no errors
• Emulator (API 36): vibrator log shows Primitive=CLICK(scale=1.00) with usage TOUCH, and scaled clicks while dragging the slider; key sound plays with system touch sounds off; bottom row, clear without undo banner, tools panel and both new pages checked on screen
• Instrumented SpaceCursorAndLetterHints + AuditInteraction 67/67 (the first full-suite run had 5 failures, 3 of them timeouts, while another session shared the emulator; both classes passed on rerun)
• Not covered locally: full instrumented suite after the strength slider (left to CI), real-device haptic feel

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