Enable APK workflow on codex branches, auto-detect trigger context, and add flight-conditions API

[Capybla]

Motivation

• Make GitHub Actions APK builds runnable from the user's working branch patterns (codex/**) and reduce friction when triggering the remote build from local shells.
• Improve the remote trigger script so it infers GITHUB_REPO/GITHUB_REF when possible to avoid manual errors.
• Add useful backend features for flight safety (flight-condition scoring and a /conditions endpoint) and include necessary frontend packaging/config files for Capacitor.

Description

• Updated .github/workflows/android-apk.yml to trigger on workflow_dispatch, tag pushes v* and pushes to main, work, and codex/** so branches like codex/paraweather build the APK.
• Enhanced frontend/scripts/trigger_github_apk.sh to auto-detect GITHUB_REPO from git remote origin and GITHUB_REF from the current branch when those environment variables are not provided, while keeping the GITHUB_TOKEN guard.
• Edited README.md to document the new triggers, examples targeting codex/paraweather, and clarified the CLI/PowerShell usage and auto-detection behavior.
• Backend changes in backend/server.py include safer MongoDB env handling and client options, added/adjusted Pydantic models (RouteSegment.altitude_status, FlightCondition), new helper functions (classify_altitude_status, weather_code_to_text, compute_flight_score), and a new API endpoint GET /api/conditions that returns a flight recommendation and score.
• Added frontend/capacitor.config.ts and updated frontend packaging artifacts (package-lock.json and other frontend files in previous diffs) to prepare the project for Capacitor/Android packaging.

Testing

• Ran bash -n frontend/scripts/trigger_github_apk.sh to validate the trigger script syntax, which passed. — OK
• Executed python -c "import json;json.load(open('frontend/package.json'));print('package ok')" to validate frontend/package.json presence/parseability, which printed package ok. — OK
• Searched and validated the README/workflow/script updates with rg for codex/**, GITHUB_REF, and GITHUB_REPO occurrences to confirm documentation and workflow alignment. — OK
• Attempted to run frontend/scripts/trigger_github_apk.sh end-to-end in this environment and it exited with a clear error due to missing GITHUB_TOKEN, which is expected (the script intentionally requires a token). — EXPECTED FAILURE

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Codex Task

[chatgpt-codex-connector]

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