refactor(fs): minimize and cap search card meta; keep TUI byte-identical

Address the review of the search render card:

- The search result view carries no `content`: it was a no-op for every
  consumer and serialized the whole search text twice. A UI without a search
  card falls back to the raw tool/result content; the TUI stays byte-identical
  to the pre-search-card generic fallback.
- Bound the serialized presentationMeta with a configurable searchMetaMaxBytes
  (default 64 KiB): the inline item cap does not bound bytes, and spill-policy
  only shrinks content, never meta. capMetaBytes drops trailing groups/paths.
- Share one retention pass (retainGrepMatches/retainGlobPaths in search-core)
  between the model-facing render and the meta projection; remove the second
  cap/preview implementation and the presentation<->grep module cycle by
  moving GrepMatch/previewLine to search-core.
- Rename the result-view discriminant kind -> shape so it no longer collides
  with GenericCallView.kind (ToolCallKind, whose values include 'search').
- Narrow the entry export surface to consumed symbols.
- Sync the three bilingual ToolResultView doc pairs and the Agent Note pair;
  document the deliberate empty-card acceptance vs diffsFromMeta.
- Regenerate config/tool/cordis catalogs for the new config field.

docs/config-catalog.md

@@ -1672,6 +1672,8 @@ export interface Config {
   grepMaxMatches?: number
   /** Max bytes retained for one matched-line preview (the cut preserves UTF-8 boundaries). */
   grepMaxLineBytes?: number
+  /** Max bytes of one search's serialized `presentationMeta`; trailing groups/paths drop past it so the persisted, re-sent card stays bounded. */
+  searchMetaMaxBytes?: number
   /** Max complete raw `rg` stdout bytes a search will parse; larger raw output fails with `SEARCH_RAW_OUTPUT_OVERFLOW`. */
   rawOutputMaxBytes?: number
   /** Cooperative tool-call timeout budget (ms) on both tools, enforced by `@deepseek-ai/dsh-timeout-policy` through `exec.signal`. */
@@ -1679,7 +1681,7 @@ export interface Config {
 }
 ```
 
-Source: [`packages/fs/tool-fs-search/src/index.ts:65`](../packages/fs/tool-fs-search/src/index.ts)
+Source: [`packages/fs/tool-fs-search/src/index.ts:71`](../packages/fs/tool-fs-search/src/index.ts)
 
 ## `@deepseek-ai/dsh-tool-goal`