feat(usage): support importing model pricing from models.dev (#4079)

* feat(usage): support importing model pricing from models.dev

Add an "Import from models.dev" button to the Add Pricing panel that
fetches https://models.dev/api.json, lists priced models sorted by
release date (newest 50 by default, full-text search across ~4800),
and bulk-imports the selected entries through the same
update_model_pricing command as manual entry.

- Normalize imported model IDs to match the backend's
  clean_model_id_for_pricing rules (strip vendor prefix, lowercase,
  truncate ':' suffix, map '@' to '-', drop the [1m] marker) so the
  stored rows actually match cost-attribution lookups
- Dedupe selections that collapse to the same model_id and report
  skipped duplicates in the success toast
- Invalidate usage queries on settled (not just success) so partial
  import failures still refresh the pricing list
- Keep ESC inside the picker's search input from closing the dialog
  and discarding the selection
- Add i18n keys for zh/en/zh-TW/ja and unit tests for the
  normalization, price formatting and flattening logic

Fixes #4017

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

* fix(usage): match scoped cost backfill against raw model aliases

The scoped backfill selected zero-cost rows via exact SQL string match,
but log columns store raw model strings (route prefixes, :free variants,
date suffixes), so alias rows were skipped until the next full backfill
on startup. Filter rows in Rust with the same model_pricing_candidates
normalization used by the pricing lookup; pricing decision logic is
untouched. Pre-existing gap from schema v11, surfaced by bulk import.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

* refactor(usage): restrict models.dev pricing import to a single model

Each update_model_pricing call triggers a backfill pass that loads
every zero-cost usage row before filtering by model, so bulk-importing
N entries scaled as selectedModels x allZeroCostLogs full scans.
Re-importing pricing is rare, so drop the batch path instead of
optimizing it: the picker is now single-select, one import runs exactly
one update_model_pricing call and one backfill pass. This also removes
the normalized-ID dedup logic and the useImportModelPricing hook in
favor of the existing useUpdateModelPricing.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

---------

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

src/i18n/locales/en.json

@@ -1509,6 +1509,20 @@
     "editPricing": "Edit Pricing",
     "pricingAdded": "Pricing added",
     "pricingUpdated": "Pricing updated",
+    "importFromModelsDev": "Import from models.dev",
+    "modelsDevHint": "Skip manual entry — pick model pricing from models.dev",
+    "modelsDevPickerTitle": "Import Pricing from models.dev",
+    "modelsDevPickerDesc": "Select a model to import (prices in USD per million tokens). One model per import.",
+    "modelsDevSearchPlaceholder": "Search models or providers (full search)...",
+    "modelsDevAllProviders": "All providers",
+    "modelsDevLoadError": "Failed to load models.dev data",
+    "modelsDevRetry": "Retry",
+    "modelsDevImportButton": "Import",
+    "modelsDevImporting": "Importing...",
+    "modelsDevImported": "Imported pricing for {{name}}",
+    "modelsDevNoResults": "No matching models",
+    "modelsDevTruncated": "Showing first {{shown}} of {{total}} results — refine your search",
+    "modelsDevDefaultHint": "Showing the {{shown}} most recently released models (of {{total}}) — type to search all",
     "cacheReadCostPerMillion": "Cache Read Cost (per million tokens, USD)",
     "cacheCreationCostPerMillion": "Cache Write Cost (per million tokens, USD)"
   },

src/i18n/locales/ja.json

@@ -1509,6 +1509,20 @@
     "editPricing": "価格設定を編集",
     "pricingAdded": "価格設定が追加されました",
     "pricingUpdated": "価格設定が更新されました",
+    "importFromModelsDev": "models.dev からインポート",
+    "modelsDevHint": "手動入力の代わりに、models.dev からモデル価格を選択できます",
+    "modelsDevPickerTitle": "models.dev から価格をインポート",
+    "modelsDevPickerDesc": "インポートするモデルを選択してください（価格単位：USD / 100万トークン）。1回につき1モデルです。",
+    "modelsDevSearchPlaceholder": "モデルまたはプロバイダーを検索（全件検索）...",
+    "modelsDevAllProviders": "すべてのプロバイダー",
+    "modelsDevLoadError": "models.dev データの読み込みに失敗しました",
+    "modelsDevRetry": "再試行",
+    "modelsDevImportButton": "インポート",
+    "modelsDevImporting": "インポート中...",
+    "modelsDevImported": "{{name}} の価格をインポートしました",
+    "modelsDevNoResults": "一致するモデルがありません",
+    "modelsDevTruncated": "{{total}} 件中、先頭 {{shown}} 件のみ表示しています。検索条件を絞り込んでください",
+    "modelsDevDefaultHint": "最新リリース順に {{shown}} 件を表示しています（全 {{total}} 件）。キーワード入力で全件検索できます",
     "cacheReadCostPerMillion": "キャッシュ読み取りコスト（100万トークンあたり、USD）",
     "cacheCreationCostPerMillion": "キャッシュ書き込みコスト（100万トークンあたり、USD）"
   },

src/i18n/locales/zh-TW.json

@@ -1481,6 +1481,20 @@
     "editPricing": "編輯定價",
     "pricingAdded": "定價已新增",
     "pricingUpdated": "定價已更新",
+    "importFromModelsDev": "從 models.dev 匯入",
+    "modelsDevHint": "無需手動填寫，可從 models.dev 選擇模型定價",
+    "modelsDevPickerTitle": "從 models.dev 匯入定價",
+    "modelsDevPickerDesc": "選擇要匯入的模型（價格單位：USD / 百萬 tokens），每次匯入一個",
+    "modelsDevSearchPlaceholder": "搜尋模型或供應商（全量搜尋）...",
+    "modelsDevAllProviders": "全部供應商",
+    "modelsDevLoadError": "載入 models.dev 資料失敗",
+    "modelsDevRetry": "重試",
+    "modelsDevImportButton": "匯入",
+    "modelsDevImporting": "匯入中...",
+    "modelsDevImported": "已匯入 {{name}} 的定價",
+    "modelsDevNoResults": "沒有符合的模型",
+    "modelsDevTruncated": "僅顯示前 {{shown}} 條，共 {{total}} 條結果，請縮小搜尋範圍",
+    "modelsDevDefaultHint": "預設展示最新發布的 {{shown}} 個模型（共 {{total}} 個），輸入關鍵字可全量搜尋",
     "cacheReadCostPerMillion": "快取讀取成本 (每百萬 tokens, USD)",
     "cacheCreationCostPerMillion": "快取寫入成本 (每百萬 tokens, USD)"
   },

src/i18n/locales/zh.json

@@ -1509,6 +1509,20 @@
     "editPricing": "编辑定价",
     "pricingAdded": "定价已添加",
     "pricingUpdated": "定价已更新",
+    "importFromModelsDev": "从 models.dev 导入",
+    "modelsDevHint": "无需手动填写，可从 models.dev 选择模型定价",
+    "modelsDevPickerTitle": "从 models.dev 导入定价",
+    "modelsDevPickerDesc": "选择要导入的模型（价格单位：USD / 百万 tokens），每次导入一个",
+    "modelsDevSearchPlaceholder": "搜索模型或供应商（全量搜索）...",
+    "modelsDevAllProviders": "全部供应商",
+    "modelsDevLoadError": "加载 models.dev 数据失败",
+    "modelsDevRetry": "重试",
+    "modelsDevImportButton": "导入",
+    "modelsDevImporting": "导入中...",
+    "modelsDevImported": "已导入 {{name}} 的定价",
+    "modelsDevNoResults": "没有匹配的模型",
+    "modelsDevTruncated": "仅显示前 {{shown}} 条，共 {{total}} 条结果，请缩小搜索范围",
+    "modelsDevDefaultHint": "默认展示最新发布的 {{shown}} 个模型（共 {{total}} 个），输入关键字可全量搜索",
     "cacheReadCostPerMillion": "缓存读取成本 (每百万 tokens, USD)",
     "cacheCreationCostPerMillion": "缓存写入成本 (每百万 tokens, USD)"
   },