"About the app" screen: what the app is, version, credit, license, and disclaimer

[almothafar]

What

Give the app a proper "About the app" surface: a brief description of what the app does, the current version, developer credit, the open-source/license status, and a short responsibility note (battery figures are device-provided estimates; the app ships "as is").

Why

• The app currently has no in-app explanation of what it is or who made it beyond the small signature footer (Compact the developer signature footer to a single line with a GitHub icon #133).
• The version is not visible anywhere in the UI (Show the app version in the app (About row at end of Settings) #113 asks for exactly this).
• An explicit free-and-open-source + Apache 2.0 statement is a trust signal for an app that reads battery state and posts notifications, and it's useful groundwork for the F-Droid listing (Publish SimpleBatteryNotifier in F-Droid #4).
• A short accuracy/warranty note sets honest expectations for the health/charging estimates (same transparency principle as Fast-drain alert: warn when battery drains abnormally fast for a sustained time #109/Charging: slow / bad-cable warning #123 messaging).

Implemented (branch claude/about-app-menu-g9p4t6)

An "About the app" item in the main overflow menu (after "Send feedback") opens a Material dialog:

• App icon + name + Version X.Y.Z (via the existing appVersionName())
• One-paragraph description in the app's existing voice (alerts, full-charge/temperature notifications, charging speed, health insights — "no bloat")
• Developed by Al-Mothafar Al-Hasan (reuses developer_name, consistent with the signature footer)
• "Free and open-source software, licensed under the Apache License 2.0."
• Disclaimer: readings/health/charging figures are device-provided estimates — guidance, not exact measurements; provided "as is", without warranty
• View on GitHub button opening the repo; OK to dismiss

All new strings translated in values-ar (Western digits via the version placeholder, per #96).

Affected code

• res/menu/menu_main.xml — new action_about item
• ui/MainActivity.java — showAboutDialog() + openProjectPage()
• res/layout/dialog_about.xml (new)
• res/values/strings.xml + values-ar/strings.xml

Content decision (settled)

Mention open source + Apache 2.0 in-app (trust signal, F-Droid groundwork). Keep the personal "playground / fun with AI" tone out of the app UI — it reads as "don't rely on this" to end users; the README/repo description is the right home for that tone.

Relation to other issues

• Show the app version in the app (About row at end of Settings) #113 (show app version): the dialog surfaces the version; decide whether that closes Show the app version in the app (About row at end of Settings) #113 or whether a Settings "About" row should still be added as part of the Settings revamp (Revamp Settings menu structure (and fix misplaced/confusing "Apply Silent Mode") #112) — possibly opening this same dialog.
• Compact the developer signature footer to a single line with a GitHub icon #133 (signature footer): unchanged; the footer and the About dialog share the developer_name string.
• Publish SimpleBatteryNotifier in F-Droid #4 (F-Droid): the in-app FOSS statement supports the listing.

Acceptance criteria

• "About the app" appears in the main overflow menu
• Dialog shows icon, name, live version, description, credit, license line, disclaimer
• "View on GitHub" opens the repo (graceful no-browser fallback)
• All new strings localized in values-ar
• Verified on device (menu, RTL/Arabic rendering, link opening) — CI build green

Open questions

• Dialog vs. a dedicated screen: if the content grows (e.g. changelog, third-party licenses), promote the dialog to a small About activity; for the current content a dialog is enough.
• Whether Settings gets an "About" row pointing at the same dialog when Revamp Settings menu structure (and fix misplaced/confusing "Apply Silent Mode") #112 lands.