[Yoldark34]

Draft, and only a step. Next step of the Repair epic, #1080, after #1054. The search belongs in the backend later (#1076): this PR only gives Repair and Find Match Add New's search box and gathers the frontend's search rules in one place until then.

Stacked on #1054, the Repair and Find Match book card: until #1054 is merged, the diff below includes its commits. This PR's own changes are its last two commits, rebuilt on #1054's current card, split into components (2026-10-27): #1054's rules (the results' header line, why there are no results said in the middle of the empty list, the answered searches and Retry, the loading and the reveal, the kept room, failed and canceled searches, the highlighted parts) apply to the search box the same way, as written in #1080.

Summary

Repair and Find Match search for a book with separate ASIN, Title and Author fields (#1054), while Add New has one search box that understands a title, an ASIN, or tokens. This PR gives the book card the same search box, and moves Add New's search rules out of its useSearch composable, where they were mixed with its page state, into one shared module that Add New, Repair and Find Match all call: a book is searched by the same rules wherever it is searched.

Changes

Changed

• The book card's ASIN, Title and Author fields become one search box, read the way Add New's is: a title, an ASIN, or TITLE:, AUTHOR:, ASIN:, SERIES: and ISBN: tokens, with its erase button. It opens on the book's title and author as tokens (TITLE:Primal Hunter, Vol. 7 AUTHOR:Zogarth); in Find Match, on what the files say. The info box says how the box is read.
• An ASIN alone (bare or ASIN:) is looked up in the region; its records are offered to pick from like any search's; none is said in the middle of the empty list ("No record for … in Audible …"). ASIN: followed by something that isn't an ASIN is a field error (orange), nothing sent, said the same way.
• Changing the region searches the box again there, the one change that searches by itself; typing only prepares the next search, as on [Step][#1080] Repair: point books at the right Audible record, from the book page and the library #1054. Search, Enter and a region change start the same search; Search becomes Retry after a search until the box or the region changes.
• The results header and the running search's text read the box as typed (Results for "TITLE:… AUTHOR:…" in France (FR)), or the ASIN (Results for ASIN "B0BK9W82PQ" in …).
• useSearch (Add New) keeps its page state (searching, status, errors) and calls the shared rules. Add New searches as before; a typed ASIN is now sent in capitals.

Added

• services/audiobookSearch.ts, the rules of Add New's search:
  • what a query is: ASIN:, ISBN:, TITLE: and AUTHOR: prefixes first, then an ISBN-13, then an ASIN or ISBN-10, else a title;
  • the TITLE:, AUTHOR:, ASIN:, SERIES: and ISBN: tokens (values of several words);
  • where each kind is searched: an ASIN through the metadata endpoint, which tries the enabled metadata sources in their priority order; an ISBN: through the advanced search, a bare ISBN through the simple one; a title through the advanced search;
  • the region, its language filter, and up to 50 results;
  • Audible's metadata for an ASIN turned into a search result.

Removed

• The card's separate ASIN, Title and Author fields, with their erase buttons and the filled-ASIN priority (an ASIN is now searched by typing it in the box).

Testing

• audiobookSearch.spec.ts (7 tests): query types, an ASIN read bare or prefixed, the tokens, and which search is called with which region, language and limit (title, ASIN, prefixed and bare ISBN, no language for "all").
• RepairBooksModal.spec.ts and LibraryImportSearchModal.spec.ts: rewritten for the search box (the token query it opens with, Enter, the region searching again, an ASIN alone taken or refused, Revert, Retry, the answered searches, the reveal, the kept room).
• Frontend: 765 passed; type-check, eslint and prettier are clean.

Notes

• Later, in the backend: one search on the server for every screen ([Discussion] One backend book search, and searches/lookups as backend jobs over SignalR #1076). This module is where the frontend's rules stand until then, so that move starts from one place instead of three.
• No change to the backend or to what Add New sends, apart from the capitalised ASIN.

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