4 Commits (53f87f51e3b71b6f4db5ca8733a4f7e415fe339e)

Author	SHA1	Message	Date
Strycher	3ff272ad8c	fix(#343): close the data-loss holes found by Gemini review ... Adversarial review (standards#145) of the storage/migration surface found four real defects, all data-integrity. All confirmed against the code and fixed; no false positives. BLOCKER - concurrent save race. saveChannelMessages / saveMessages are read-modify-write with an await gap, so two saves to the same key raced and the second clobbered the first, silently losing messages (e.g. a message and its delivery ack arriving together). BlobStore now provides synchronized(key, ...), a per-key operation chain; every RMW - merge-save, remove, and the load-path legacy migration - runs through it. Different keys stay concurrent. New test fires two concurrent saves and asserts the union survives. BLOCKER - non-atomic DB relocation. The documents->support move copied and deleted each file (.sqlite/-wal/-shm) in turn, so a failure after the main file moved stranded the DB across two locations and corrupted it. Now copies all files, verifies each by size, and only then deletes the sources; on any failure it rolls back the destination and leaves the original intact. MAJOR - load-path legacy migration raced save. The #194 index->PSK adoption did a blind write to the PSK key that could clobber a save that landed first. It now runs under the key lock and MERGES (union) instead of overwriting, so both the adopted history and any fresh message survive. MINOR - channel merge key lacked a sender. Two senders posting identical text at the same timestamp without a messageId would collide and lose one. The key now includes the sender, matching MessageStore. flutter analyze clean, dart format clean, 509 tests pass. Full Gemini log in docs/llm-consultations/.	1 day ago
Strycher	fa470c1442	fix(#335): store the drift DB in app-support, not OneDrive-synced Documents ... drift_flutter's native default is getApplicationDocumentsDirectory(), which on Windows resolves to the user's Documents folder - redirected into OneDrive on most machines (verified: drift_flutter 0.3.1 connect.dart). A live SQLite file syncing to OneDrive risks lock contention and corruption, and it is simply the wrong place for app data. The DB now opens in getApplicationSupportDirectory() (%APPDATA% on Windows), the same place SharedPreferences already lives, so all app data sits together. Existing installs already have a DB in the old location, so opening a fresh one there would abandon their migrated history. _appSupportDatabaseDirectory() relocates it once on first run: it moves offband_store.sqlite and its -wal/-shm sidecars from the documents dir to the support dir before drift opens, and never deletes a source without a successful copy. If relocation fails it is logged loudly and a fresh DB is created, with the migration re-running from SharedPreferences rather than silently losing anything. Web is unaffected: path_provider has no web backend and drift ignores databaseDirectory there, using OPFS/IndexedDB. Adds `path` as a direct dependency (was transitive). flutter analyze clean, tests pass.	1 day ago
Strycher	847a28df3e	feat(#335): prove drift/SQLite-WASM works in a real browser ... Step 1 gate, web half. Building is not evidence, so this was run in a browser. Assets: sqlite3.wasm (748 KB) and drift_worker.js (355 KB), both taken from the SAME drift-2.34.2 release so they are built against each other. Validated before use - the wasm has correct WebAssembly magic (0061 736d) and carries SQLite 3.53.3; the worker is genuine compiled Dart JS. Note the filename: the release ships `drift_worker.js`, not the `drift_worker.dart.js` the docs name. The database URI was corrected to match, which would otherwise have been a silent 404 at runtime. Browser result, served over HTTP with COOP/COEP and Content-Type: application/wasm: Using WasmStorageImplementation.opfsLocks PROBE-OK open+write+read PROBE-OK 6MiB round-trip (localStorage cap is 5MiB) drift selected OPFS, the top storage tier, and round-tripped 6 MiB - data the current localStorage-backed web build physically cannot hold. No exceptions. Adds web/_headers for Cloudflare Pages: forces application/wasm on the wasm asset and sets COOP/COEP for cross-origin isolation. Verified to ship into build/web. Without COOP/COEP drift still works, falling back to IndexedDB, which is slower but still unbounded next to localStorage - a performance tier, not a correctness requirement. web_probe/ is a standalone entrypoint that exercises ONLY the drift stack, so a pass or fail is unambiguous without BLE and the rest of the app in the way. It is not part of the app build. Still no user data touched and no store switched over. The migration is the next step. flutter analyze clean, dart format clean, 497 tests pass.	1 day ago
Strycher	19858698ee	feat(#335): add drift and prove it opens on the targets buildable here ... Step 1 of #335, deliberately before any data migration: prove the store works before trusting it with message history. Adds drift + drift_flutter, a key/value StoredBlobs table mapping 1:1 onto the existing SharedPreferences keys, and verifyReadWrite() as a runtime probe. Key/value rather than relational tables on purpose: it maps directly onto the current store interfaces, so callers do not change and the migration can be verified row-for-row against the old keys. Relational schemas come later, once this is proven and querying is actually wanted. Verified here: - 3 tests pass, including a 6 MiB round-trip - larger than the 5 MiB localStorage cap that makes the web build impossible today - flutter analyze clean - Windows release build succeeds - Web release build compiles Two findings from the gate that a plan-on-paper would have missed: 1. sqlite3_flutter_libs 0.6.0+eol is a DEPRECATED no-op. From sqlite3 v3.x it is unnecessary and drift_flutter already covers it, so it is not a direct dependency here. 2. The web build COMPILES BUT WOULD FAIL AT RUNTIME: drift needs sqlite3.wasm and drift_worker.dart.js shipped in web/, and neither is present. Per drift docs they are downloaded from GitHub releases, version-matched to pubspec.lock (drift 2.34.2, sqlite3 3.5.0), and the server must serve .wasm as Content-Type: application/wasm. Not done here - downloading files needs explicit human approval. Also noted: the drift_dev CLI does not compile at these versions (allSchemaEntities missing from the drift3_preview GeneratedDatabase), so its asset tooling is unavailable. build_runner code generation is unaffected. No user data is touched. No store is switched over. The migration is the next step and remains gated on the web assets question.	1 day ago