Enhance verify-on-device skill with POS navigation and logcat verification

[malinajirka]

Fixes #woomob-2552

Summary

Restructures the verify-on-device skill for better POS coverage, lower token usage, and faster execution.

Changes

• Split navigation into reference files — extracted inline navigation (194 lines) into references/main-app-navigation.md and references/pos-navigation.md with full feature trees
• Added POS navigation coverage — screen identifiers, checkout/refund/bookings workflows, tracking events (previously absent)
• Added logcat event verification — verify actions via analytics events instead of screenshots
• Added context: fork — skill runs in isolated forked context, keeping main conversation clean
• Added $ARGUMENTS — forked context receives the user's task
• Eliminated routine screenshots — verification priority: logcat events > element lists > screenshots (last resort)
• Added mobile-mcp + skill permissions to project settings so the skill runs without permission prompts

Benchmark Results (POS Checkout Flow)

Run	Method	Screenshots	Tool Calls	Tokens	Duration
Before	Agent (original skill)	5	27	43k	3.7 min
After	context: fork (final)	0	18	n/a	1.4 min

33% fewer tool calls, 62% faster, zero screenshots, 5 logcat events verified.

Key Design Decisions

• context: fork over Agent tool — declarative, always isolates regardless of how skill is invoked
• Logcat-first verification — zero context cost vs screenshots which load images into context
• Two reference files (main app + POS) — mirrors the real architectural boundary (different Activity, ViewModel patterns, navigation)
• No milestone sub-agents — nested agent spawning isn't supported in forked contexts; direct navigation with logcat verification is efficient enough (18 tool calls / 85s for a full checkout)

Test plan

• Ask claude to verify a certain UI flow on an emulator or a hw device.

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[wpmobilebot]

📲 You can test the changes from this Pull Request in WooCommerce Android by scanning the QR code below to install the corresponding build.

	App Name	WooCommerce Android
	Platform	📱 Mobile
	Flavor	Jalapeno
	Build Type	Debug
	Build Number	736
	Version	24.4-rc-1
	Application ID	com.woocommerce.android.prealpha
	Commit	3966b0f
	Installation URL	78jhad7jea5v0

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