fix(news): match complete ticker tokens in Symbol filters

[luokerenx4]

News → Symbol currently returns ordinary words for short tickers: F matches “Fed cuts rates”. This Draft fixes only the production and demo list filters for #1387; Keyword search remains a substring search.

Review order: 1 of 2. This PR remains based on dev at head 232c6f0a661881a7cf4bd8a61441b72191da2a36. Dependent Draft #1755 now targets codex/news-symbol-boundaries and includes this exact commit. Review this ticker-boundary fix first, then #1755's provenance delta; its combined head is d93911d1fd4d7e4c85711dddd4ce7de4c439ef22. Both original intents remain separately reviewable and the overlapping predicates are already reconciled.

flowchart TD
  A[Symbol F] --> B[Existing news list filter]
  B --> C[Before: substring match - defective]
  C --> D[Fed cuts rates included]
  B --> E[Review 1 - PR 1743: compare complete ticker tokens]
  E --> F[F announces earnings included; Fed excluded]
  G[Review 2 - dependent PR 1755] --> H[Exclude source and unknown category evidence]
  H --> E
  E --> I[Apply result limit after matching]

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The existing routes keep ownership of filtering before the result limit. Replace their Symbol substring check with a small Unicode-aware token comparison; retain dots, hyphens, slashes, colons, carets and equals inside ticker tokens. No registry, company inference, provider request, or persisted state is added. The demo mirrors the same rule.

Tradeoff: this is lexical matching, not evidence of a company association. A standalone ordinary word equal to a ticker can still match. Case-insensitive behavior remains intentional. Feed/tag provenance is separately assigned to #1380/#1381.

Validation:

• Production HTTP and MSW demo regression suites: 28 tests passed, including F/A/T, BRK.B, BTC-USD, ^GSPC, 2330.TW and EURUSD=X, keyword behavior and filtering before limiting.
• Root and UI TypeScript checks passed after building the existing shared protocol packages.
• Real Chromium demo route: Symbol F shows no unrelated stories; NVDA shows its expected story.
• git diff --check passed.
• Full hermetic suite completed: 890 files passed, 9 failed, 1 skipped; 7,608 tests passed, 49 failed, 6 skipped. Failures report missing node-pty and Electron binaries, missing bundled Git (Workspace absorb/upgrade suites), and npm cache ENOENT under the non-writable default home. News and UI tests passed; the full suite is not green.
• Standard frozen install could not download bundled Git (ECONNREFUSED). Frozen install with lifecycle scripts disabled completed; native/Git-dependent full-suite checks therefore have an environment gap. No dependency or lockfile changes.

Four files, 44 insertions / 2 deletions. Based on current dev 4813c1b89d8c151a7853f717e31629f3ec1f3b4c. No merge, release, deployment or issue closure requested.

Pushed head 232c6f0a661881a7cf4bd8a61441b72191da2a36 verified against the remote branch. GitHub clean-build passed on that SHA.

Stack acceptance: #1755's four combined regression cases run against both production and demo. Deliberately restoring substring matching makes all four fail; restoring source/unknown category evidence also makes all four fail. The intended integrated tree passes 137 focused tests plus root, UI and registered-suite typechecks. The child head d93911d1fd4d7e4c85711dddd4ce7de4c439ef22 passed clean-build and the integrated Chromium Symbol/Keyword check. CI and verification details are recorded on #1755.

When accepted, integrate #1743 first while preserving its commit ancestry, then retarget #1755 to dev. Do not take either old predicate wholesale or cherry-pick a conflicting standalone patch: the child branch already contains the resolved composition. Neither PR has been merged.

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Project	Deployment	Actions	Updated
openalice-demo	Ready	Preview	Oct 2, 2026 10:21am UTC