fix(copy): correct stale and misleading WHOOP 5.0/MG text on Apple, Android and docs

[JohanStefanes]

Summary

Text-only pass over user-facing WHOOP 5.0/MG copy on Apple (macOS/iOS), Android and the docs. Every changed string was first checked against the code that decides the behaviour; no BLE command, gate, analytics formula or stored value changes.

Main corrections:

• Wrong navigation path (Refs Alarms: the 5/MG strap-alarm warning points to 'Settings, Experimental', but the switch is Test Centre → Protocol probes (and a 5.0 fire is now reported) #2464): 5/MG probe, ECG and alarm hints now point to Test Centre → 5/MG protocol diagnostics → Protocol probes (or Test Centre → Connection & Sync), not the removed Settings → Experimental section. README, FEATURES and the protocol docs follow.
• Strap alarm on 5/MG: both platforms now say the 5/MG firmware alarm is experimental and only arms while Protocol probes is on. Android's "Buzz WHOOP 5/MG" companion row no longer promises a strap buzz that is never armed with probes off. Neither platform promises that switching off clears an alarm already on the strap ("may still be set").
• Probe verdicts (98/84): "ACCEPTED" became "answered — N-byte payload (not a success verdict; see the bytes below)", identical on Swift and Kotlin, with tests updated on both.
• Hello-suppressed 5/MG: the Health sync card, the Sync now hint, the Shortcuts reply and the Live Activity no longer claim a pairing handshake is in progress.
• Pairing: the add-device step says how to enter pairing mode (tap until the LEDs flash blue); the bond-refusal hint is split for macOS and iOS.
• Stale capability claims: onboarding expectation card, 5/MG steps calibration footnote, skin-temperature empty state, SpO₂ readouts, spot-HRV caveat (both WHOOP generations give optical R-R) and the 5/MG device-card footnote now match the code.
• Translations: every changed English string is updated in all Android locales and in Localizable.xcstrings. The MG ECG medical disclaimer stays deliberately untranslated, as before.

Historical changelog entries are untouched; only the live onboarding Expectation card in AppChangelog.swift changed.

Verification

• xcodebuild scheme Strand (macOS) and NOOPiOS (iOS Simulator): build succeeded.
• swift test: WhoopProtocol (816 tests) and StrandAnalytics (2143 tests) pass.
• ./gradlew testFullDebugUnitTest: passes apart from 2 RecoveryDriversTest cases (half-tie rounding) that fail the same way on unmodified main.
• python3 -m unittest discover -s Tools: passes apart from 4 test_check_source_references cases (/var vs /private/var temp-path on macOS) that fail the same way on unmodified main.
• Tools/i18n_audit.py --ci and Tools/doc_comment_lint.py: pass.
• Not tested on hardware: copy-only change.

StrandTests was not run locally; app-build.yml runs it on this PR.

🤖 Generated with Claude Code