[JOY (JOY)]

Closes #1297
Closes #1298
Closes #1299
Closes #1300
Closes #1301
Closes #1302

Fixes from an audit of the browser extension (apps/extension). Nothing changes what the extension collects or sends (#1175): the opt-in crowd signal is sent in exactly the cases it was before.

What users see

• fix(extension): side panel lists sold-out and bait-price offers as current prices #1297, side panel price list. In-stock, plausible offers come first. Sold-out and discontinued rows are marked "Hết hàng" / "Ngừng bán" with a muted last price, and bait rows "Giá thấp bất thường". The "Rẻ nhất" tag only goes on a buyable row. Server: the extension lookup adds a per-offer implausiblyLow flag (additive), judged among in-stock offers as on the product page.
• fix(extension): toolbar badge says OK for a bait price, an unchosen size or an accessory #1298, badge and pill. A bait price gives an amber "!" badge, the warning pill theme and an amber verdict in the panel. Insufficient data (including an unchosen size) gives "?", and accessories or not-found give no badge; "OK" no longer shows for these.
• fix(extension): side panel draws a product card when the lookup finds nothing #1299, not found. Not-found, quick queries with no match and accessory pages show "Chưa có sản phẩm này trên Rate.vn" with a search link instead of a product card with smartphone links. The duplicate "Kiểm tra chi tiết" button is gone, and the fallback compare link uses ?category=.
• fix(extension): lookup errors show "not a product page" and leave the previous pill #1300, errors. A failed lookup shows an error card with "Thử lại". It has distinct texts for rate limiting (429), Rate.vn errors (5xx) and no connection.
  • The previous product's pill and badge are cleared, and an open side panel reloads.
  • Only the tab's latest lookup may set or clear its pill, badge and panel, so a late answer for an earlier product on a single-page shop cannot touch the current one.
• fix(extension): products with no reviews show 0.0 stars and 100% genuine #1301, no reviews. "Chưa có đánh giá" instead of "★ 0.0" and "100% thật"; offer rows with no rating show no star.
• fix(extension): side panel mixes English labels and misses accessible names #1302, labels and accessibility. Vietnamese labels instead of "Rate.vn Intelligence", "Dual Risk Score", "Trust Score", "Fake Sale", "[Mall]" and "Máy chủ Rate API BFF". Offer rows say "Rủi ro tổng hợp" (fix(web): read the merchant risk split, label the column as combined risk #1280). The quick lookup input is labelled, results are announced (aria-live="polite"), and the pill's accessible name includes the verdict. Full vi/en/cs support is feat(extension): vi, en and cs through chrome.i18n #1304.

Code

• New pure modules apps/extension/src/sidepanel/panel-view.ts and apps/extension/src/verdict-display.ts, so the rendering and badge mapping are testable.
• apps/web/src/server/rate/extension.ts: the additive offer flag.
• The compare page reading ?cat= (the server-built compareUrl) is fix(web): compare links with ?cat= open on smartphones #1303 / fix(web): compare links with ?cat= open on their category #1316.

Tests

apps/extension/src/test-extension-pipeline.ts: offer order and marks, the cheapest tag, badge and pill per verdict, the not-found and accessory states and action links, error kinds and texts, empty reviews, labels and accessible names. Extension typecheck, lint, test and build pass, as do web typecheck, lint and test.

Review

• Round 1, fresh-context subagent: no P0-P2. Its P3s fixed: the crowd signal skipped on HTTP errors (restored), an open panel kept the old product on failure, the panel verdict colour.
• Round 1, Codex: its P2 fixed: a late failure for an earlier product cleared the current pill and badge.
• Round 2, Codex: its P1 is fixed (the crowd signal was sent after a network error, where it never was before); no P0/P1 left.
• Left (P3):
  • nested live regions may announce twice;
  • a new extension build used against an old server treats bait rows as buyable, so deploy the server first;
  • there is no unit test for the server flag.

🤖 Generated with Claude Code

---

📌 TL;DR

This PR refactors the Rate.vn Chrome extension to improve error handling, UI accuracy, and accessibility. It introduces a new panel-view module for testable HTML rendering, implements race-condition guards for product lookups, and refines the display of price verdicts, offer availability, and review data.

🎯 Type of Change

• 🚀 New feature
• 🐛 Bugfix
• 🧹 Refactor
• ⚡ Performance
• 📚 Documentation
• ⚙️ CI / Configuration

🔍 Changes Walkthrough

File	Summary of Changes
apps/extension/CHROMEWEBSTORE.md	Updated privacy documentation to clarify the opt-in crowd signal toggle label.
apps/extension/src/background/service-worker.ts	Refactored lookup logic to return a LookupOutcome (distinguishing success, HTTP errors, and network failures). Added a request counter to prevent race conditions where stale lookups overwrite fresh UI state. Updated badge logic to use the new resolveActionBadge helper.
apps/extension/src/content/content-script.ts	Removed local theme logic in favor of resolvePillTheme. Added a generation counter to ensure only the latest page inspection renders the trust pill, preventing stale UI on single-page applications. Improved accessibility labels.
apps/extension/src/sidepanel/panel-view.ts	New File. Extracted pure HTML builder functions for the side panel (offers, reviews, errors, not-found states). Added logic to sort offers by buyability/price and classify lookup failures (rate limit, server, network).
apps/extension/src/sidepanel/sidepanel.html	Added CSS classes for offer marks (sold out, bait price, best price). Updated labels to Vietnamese (e.g., "Chính hãng" instead of "[Mall]"). Added aria-live and aria-label attributes for accessibility.
apps/extension/src/sidepanel/sidepanel.ts	Refactored to use the new panel-view builders. Implemented specific error handling for lookup failures (showing retry buttons and specific error messages). Fixed action link rendering to avoid duplicates. Updated "not found" and "accessory" states to show appropriate UI.
apps/extension/src/test-extension-pipeline.ts	Added comprehensive tests for the new panel-view logic, including offer sorting, badge resolution, error classification, and HTML escaping.

📊 Architectural Flow

sequenceDiagram
    participant CS as Content Script
    participant SW as Service Worker
    participant API as Rate.vn API
    participant SP as Side Panel

    CS->>SW: RATE_PRODUCT_DETECTED (signal)
    SW->>SW: Increment detectRequestCounter
    SW->>API: GET /lookup
    API-->>SW: Response (Data or Error)
    
    alt Lookup Success
        SW->>SW: Check if request is still latest
        SW->>CS: Send Data
        CS->>CS: Render Trust Pill (if latest)
        SW->>SP: Update Session Storage
        SP->>SP: Render Product Card (panel-view)
    else Lookup Failure (429, 500, Network)
        SW->>SW: Check if request is still latest
        SW->>CS: Send Error Status
        CS->>CS: Remove Trust Pill (if latest)
        SW->>SP: Update Session Storage (Error)
        SP->>SP: Render Error Card (panel-view)
        SP->>User: Show Retry Button
    end

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Project	Deployment	Actions	Updated
rate	Ready	Preview	Oct 28, 2026 7:41pm UTC

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Commits

Reviewing files that changed from the base of the PR and between 4eca23d and 792c250.

Files selected for processing: 10

• apps/extension/CHROMEWEBSTORE.md
• apps/extension/src/background/service-worker.ts
• apps/extension/src/content/content-script.ts
• apps/extension/src/sidepanel/panel-view.ts
• apps/extension/src/sidepanel/sidepanel.html
• apps/extension/src/sidepanel/sidepanel.ts
• apps/extension/src/test-extension-pipeline.ts
• apps/extension/src/types.ts
• apps/extension/src/verdict-display.ts
• apps/web/src/server/rate/extension.ts

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⏱️ Code Review completed (10 eligible files · 68,616 chars · 3 model call(s) · 3 PR unit(s))

Whole diff with bounded context at base 4eca23d / head 792c250.

✅ No verified defects

1 possible issue(s) could not be grounded in or verified against the snapshot source, so they are not published.

Context investigation was bounded to the explicitly requested snapshot paths.