fix: hide splash screen from root layout

[0x1337ak]

Summary

• hide the Expo splash screen from the root layout after the root view lays out
• remove the nested tab-layout splash timer so splash handling has one owner
• hide only after the app has rendered its first UI, including any redirect caused by auth state.

[netlify]

✅ Deploy Preview for obytes-starter canceled.

Name	Link
🔨 Latest commit	8f6b739
🔍 Latest deploy log	https://app.netlify.com/projects/obytes-starter/deploys/6a1ec66339c46300082cfcb1

[github-actions]

💯 Test Coverage

Lines	Statements	Branches	Functions
	30.78% (129/419)	35.04% (82/234)	27.36% (52/190)

😎 Tests Results

Tests	Skipped	Failures	Errors	Time
40	0 💤	0 ❌	0 🔥	19.329s ⏱️

👀 Tests Details • (31%)

File	% Stmts	% Branch	% Funcs	% Lines	Uncovered Line #s
All files	30.78	35.04	27.36	31.42
app	0	0	0	0
_layout.tsx	0	0	0	0	23–89
app/(app)	0	0	0	0
_layout.tsx	0	0	0	0	14–58

[ShingLi]

It seems this PR still hasn't resolved the white screen issue during app cold start in the development environment. The splash screen disappears automatically before preventAutoHideAsync() is executed in Layout.tsx, which causes it to reappear once the bundle finishes loading

[0x1337ak]

@ShingLi if you're using android it's a known issue
check this
expo/expo#40464 (comment)

[ShingLi]

@ShingLi if you're using android it's a known issue check this expo/expo#40464 (comment)

oh, cool. thanks for the tip