safety: make SOS dispatch status honest

[NITISH-R-G]

Description

Tightens RoadSOS emergency-path honesty and removes several false-confidence behaviors found during the critical feature audit.

Fixes # (issue)

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update

What changed

• Stops treating an Android SMS composer launch as an automated SMS send.
• Removes the fake “nearby services broadcast succeeded” path and marks it as info-only until a real integration exists.
• Adds a bounded emergency dialer fallback row when automated SMS is not accepted.
• Lengthens SOS location timeout so LocationService can reach OS last-known fallback before giving up.
• Makes Demo Mode short-circuit before real GPS, AI, dispatch, dialer, incident storage, or family channels.
• Replaces optimistic TTS/notification copy with dispatch-status wording.
• Adds a localized triage medical disclaimer to the triage card.
• Rebuilds compressed triage payloads after safety overrides and clamps/drops invalid triage schema values.
• Hardens the SMS Edge Function with bearer validation and server-side emergency-number routing for India service classes.

How Has This Been Tested?

• Unit Tests
• Integration Tests
• Manual Smoke Test (on physical device)
• Static/local checks available in this cloud environment

Commands/checks run:

• python3 JSON parse of all lib/l10n/app_*.arb files
• git diff --check
• Source search confirming removed false-success strings/stubs are gone
• RoadSOS critical-rule reviewer pass (remaining note: orchestrator changes still require human reviewers; full Flutter/Dart test execution unavailable because this cloud image has no flutter, dart, or deno binaries on PATH)

Checklist:

• My code follows the style guidelines of this project where verifiable in this environment
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings in available static checks
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

RoadSOS critical-rule notes

• Phase 1: Demo Mode now stays simulated and does not contact real emergency channels.
• Phase 4: Dispatch rows now avoid optimistic success and report SMS/dialer limitations explicitly.
• Phase 4 AI: Triage UI includes guidance-only emergency disclaimer; validation clamps invalid severity and drops unsupported services.
• Phase 5: SMS relay no longer accepts unauthenticated requests, but production should replace shared client bearer with proper Supabase user/JWT auth plus persistent rate limiting before launch.