fix(l10n): repair corrupted duration abbreviations in ar/bn/hi/ja/ru/zh ARB files
Sleep-timer duration strings (durationHoursMinutesSeconds, durationMinutesSeconds, durationMinutesOnly, durationSecondsOnly) contained literal "?" characters instead of the native hour/minute/second abbreviation in 6 locales. Replaced with correct native short-form units per locale, verified byte-exact against a pinned spec table and against the already-correct neighboring hoursLabel/minutesLabel/secondsLabel values in each file.
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Javier Bautista Fernández
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# Design: Repair corrupted sleep-timer duration abbreviations in 6 ARB locales
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## Technical Approach
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Content-only data repair. For each of the 6 corrupted ARB files (`app_{ar,bn,hi,ja,ru,zh}.arb`), replace the value of exactly 4 duration keys (`durationHoursMinutesSeconds`, `durationMinutesSeconds`, `durationMinutesOnly`, `durationSecondsOnly`, physical lines 19/27/34/40) with the byte-exact pinned strings from the spec table. No Dart, no CI, no generated-file changes. Validation is static-only (tooling hangs here). Maps directly to the proposal's "Approach" and the spec's four requirements.
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## Architecture Decisions
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### Decision: Full-value line replacement (not `?`-glyph swap)
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| Option | Tradeoff | Decision |
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|---|---|---|
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| Swap only `?` → abbrev in place | Fails for ja/zh: pinned strings also collapse inter-unit spaces (`{hours}?? {minutes}? {seconds}?` → `{hours}時間{minutes}分{seconds}秒`), so a glyph-only swap yields wrong output | Rejected |
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| Replace the entire quoted value on each target line | Spec pins the exact final string per cell; one deterministic edit per line, no per-locale spacing logic | **Chosen** |
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**Rationale**: The spec table is the single source of truth. The edit unit is the whole line `"<key>": "<value>",`; `old_string` = current corrupted line, `new_string` = pinned line. Surrounding bytes (and the other ~386 keys) are never touched.
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### Decision: Surgical single-line edits, no JSON re-serialization
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| Option | Tradeoff | Decision |
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|---|---|---|
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| Parse → mutate → re-dump JSON | Reflows/re-escapes all ~386 keys, reorders/renormalizes unicode, huge noisy diff, risk to untouched cells | Rejected |
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| Exact-string edit of only the 4 target lines/file | Diff is exactly 4 lines/file (24 total); all other bytes provably identical | **Chosen** |
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### Decision: Static validation instead of flutter/dart tooling
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`flutter build`, `gen-l10n`, `dart analyze`, `flutter analyze` all hang in this environment and MUST NOT run. A short Python one-off (stdlib `json`, byte reads) gives equivalent safety for a content-only change: JSON well-formedness, UTF-8 integrity, diff scope, residual-`?`, and placeholder integrity.
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## Data Flow
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spec table (24 pinned cells)
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│ authoritative source
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▼
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Edit tool ──(4 exact-string line edits/file)──▶ app_{locale}.arb ×6
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│
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▼
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static validator (Python + git diff)
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│ pass/fail gate
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▼
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single commit (6 files)
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## File Changes
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| File | Action | Description |
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|------|--------|-------------|
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| `lib/l10n/app_ar.arb` | Modify | Lines 19/27/34/40: values → pinned `ar` cells |
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| `lib/l10n/app_bn.arb` | Modify | Lines 19/27/34/40: values → pinned `bn` cells |
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| `lib/l10n/app_hi.arb` | Modify | Lines 19/27/34/40: values → pinned `hi` cells |
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| `lib/l10n/app_ja.arb` | Modify | Lines 19/27/34/40: values → pinned `ja` cells (spaces collapse) |
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| `lib/l10n/app_ru.arb` | Modify | Lines 19/27/34/40: values → pinned `ru` cells |
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| `lib/l10n/app_zh.arb` | Modify | Lines 19/27/34/40: values → pinned `zh` cells (spaces collapse) |
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**Explicitly out of scope (unchanged):** `lib/l10n/gen/app_localizations.dart` (generated; do NOT hand-edit — ICU placeholder shape `{hours}/{minutes}/{seconds}` is identical pre/post, so no regeneration is needed for these keys to render correctly), `app_localizations_ext.dart`, any CI/workflow file, and the `@durationXxx.placeholders` metadata blocks.
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## Interfaces / Contracts
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No interface change. ICU placeholder names, casing, and count are invariant: `{hours}`, `{minutes}`, `{seconds}`. The generated `AppLocalizations` method signatures are unaffected.
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## Testing Strategy
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| Layer | What to Test | Approach |
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|-------|-------------|----------|
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| Static | All 6 files parse as JSON | Python `json.load` each file |
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| Static | UTF-8 integrity, no replacement char | Read bytes, `decode('utf-8')` strict; assert no `�` |
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| Static | Diff scope = only the 4 lines/file | `git diff --stat` / per-line diff; assert exactly 24 changed lines total, additions==deletions |
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| Static | Zero literal `?` in 24 target values | Assert `'?' not in value` for each target key |
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| Static | Placeholder integrity | Regex-extract `{...}` tokens from each fixed value; assert equals expected set/order per key; `@`-metadata blocks byte-unchanged |
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| Static | Byte-exact match to spec | Assert each fixed value `==` its pinned spec cell |
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`git diff --check` additionally guards against whitespace/EOL damage. No runtime/widget test (no code path changes; tooling forbidden).
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## Threat Matrix
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N/A — no routing, shell, subprocess, VCS/PR automation, executable-file classification, or process-integration boundary. Pure ARB content edit.
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## Migration / Rollout
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No migration. Single commit touching only 6 ARB files; `git revert` fully restores prior state with zero cross-dependencies.
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## Open Questions
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- [ ] None — the spec pins all 24 target cells byte-exactly; no content or architectural decision remains.
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