chore: tighten validation and runtime logging

* chore: tighten validation and runtime logging

* fix(i18n): localize new settings labels

docs/architecture/validation-map.md

@@ -0,0 +1,56 @@
+# Validation Map
+
+This map records the lowest-cost validation commands agents should reach for
+before broad CI-sized runs.
+
+## Discovery
+
+```bash
+pnpm nx show projects --withTarget test
+pnpm nx show projects --withTarget lint
+pnpm nx show projects --withTarget e2e
+```
+
+## Unit And Type Checks
+
+| Area                               | Command                             |
+| ---------------------------------- | ----------------------------------- |
+| Angular renderer entry points      | `pnpm run typecheck:web`            |
+| Electron main process entry points | `pnpm run typecheck:backend`        |
+| Curated CI unit suite              | `pnpm run test:unit:ci`             |
+| EPG data access                    | `pnpm nx test epg-data-access`      |
+| Workspace shell utilities          | `pnpm nx test workspace-shell-util` |
+| Shared SQLite schema/connection    | `pnpm nx test database`             |
+| Packaging metadata                 | `pnpm nx test packaging`            |
+
+## E2E
+
+| Area                  | Command                                         |
+| --------------------- | ----------------------------------------------- |
+| Web app browser flows | `pnpm nx run web-e2e:e2e -- --project=chromium` |
+| Electron flows        | `pnpm nx run electron-backend-e2e:e2e`          |
+
+Use atomized E2E targets when available, for example
+`pnpm nx run web-e2e:e2e-ci--src/xtream.e2e.ts`.
+
+## I18n
+
+```bash
+pnpm run i18n:check
+```
+
+The i18n check is non-mutating. It compares every locale file in
+`apps/web/src/assets/i18n/` against `en.json` and fails on missing or extra keys.
+Identical English fallback values are reported as warnings by default; use
+`node tools/i18n/check-drift.mjs --fail-on-identical` for a stricter translation
+audit.
+
+## Logging
+
+Runtime playback and EPG debug logs should use the existing logger or trace
+helpers instead of unconditional `console.log`. Electron external-player traces
+are gated by:
+
+```bash
+IPTVNATOR_TRACE_PLAYER=1 pnpm run serve:backend
+```