feat(android): Implement native splash screen

[rainxchzed]

This commit introduces a native splash screen on Android using the SplashScreen API. It replaces the default blank window with a themed splash screen that displays the app logo.

• feat(android): Added splash.xml to define the Theme.GitHubStore.Splash theme, which sets the splash screen icon and background color.
• feat(android): Created ic_splash.xml drawable to display the app logo with appropriate insets on the splash screen.
• style(android): Updated the ic_launcher_background color to #101010 in colors.xml.
• refactor(android): Updated AndroidManifest.xml to apply the new Theme.GitHubStore.Splash as the application's theme.

Summary by CodeRabbit

• Style
  • Redesigned the splash screen with an animated logo and custom visual theme
  • Updated the launcher background to a darker color scheme for improved visual harmony and enhanced contrast
  • Configured a new application theme that applies after the splash screen is dismissed, ensuring consistent appearance throughout the app

[coderabbitai]

Walkthrough

This pull request implements an Android splash screen by updating the application theme in the manifest, adding a custom splash theme configuration, and creating associated drawable and color resources for the splash screen's visual appearance.

Changes

Cohort / File(s)	Summary
Manifest Theme Configuration composeApp/src/androidMain/AndroidManifest.xml	Updated application theme from legacy Material theme to custom Theme.GitHubStore.Splash for splash screen implementation.
Splash Screen Resources composeApp/src/androidMain/res/drawable/ic_splash.xml, composeApp/src/androidMain/res/values/colors.xml, composeApp/src/androidMain/res/values/splash.xml	Added splash drawable with inset logo, defined new Theme.GitHubStore.Splash style with animated icon and dark background color (#101010), and configured post-splash transition theme.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

Poem

🐰 A splash of style, dark and grand,
Logo centered, as we planned,
Android greets with flair so bright,
Dark background, logo's light,
Welcome screens now take their stage! ✨

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'feat(android): Implement native splash screen' directly and clearly summarizes the main change - adding a native Android splash screen implementation.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch splash-and-statusbar

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[coderabbitai]

🧹 Nitpick comments (1)

composeApp/src/androidMain/res/values/colors.xml (1)

3-3: Consider using a dedicated color resource for the splash background.

Reusing ic_launcher_background for the splash screen couples the launcher icon background with the splash screen background. If these need to diverge in the future (e.g., different branding requirements), you'd need to update references in multiple places. Consider defining a separate splash_background color for clarity and flexibility.

That said, if the intent is to keep both synchronized, this approach is acceptable.

🤖 Prompt for AI Agents

Verify each finding against the current code and only fix it if needed.

In `@composeApp/src/androidMain/res/values/colors.xml` at line 3, The splash
screen currently reuses the ic_launcher_background color resource which couples
launcher icon styling with splash branding; create a new color resource named
splash_background and set it to the desired hex value (copy current `#101010` or a
new value), then update any splash layout or theme references to use
splash_background instead of ic_launcher_background so the two can diverge
independently (look for usages of ic_launcher_background in splash/theme XML and
replace them with splash_background).

🤖 Prompt for all review comments with AI agents

Verify each finding against the current code and only fix it if needed.

Nitpick comments:
In `@composeApp/src/androidMain/res/values/colors.xml`:
- Line 3: The splash screen currently reuses the ic_launcher_background color
resource which couples launcher icon styling with splash branding; create a new
color resource named splash_background and set it to the desired hex value (copy
current `#101010` or a new value), then update any splash layout or theme
references to use splash_background instead of ic_launcher_background so the two
can diverge independently (look for usages of ic_launcher_background in
splash/theme XML and replace them with splash_background).

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ℹ️ Review info

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between e40f2bc and d48f6ee.

📒 Files selected for processing (4)

• composeApp/src/androidMain/AndroidManifest.xml
• composeApp/src/androidMain/res/drawable/ic_splash.xml
• composeApp/src/androidMain/res/values/colors.xml
• composeApp/src/androidMain/res/values/splash.xml