quak helper fix-missing-thumbnails --file on an empty cache stops fetching collections once it finds every file (closes #223)

`helper fix-missing-thumbnails --file` used to wait for a refresh, which
on an empty cache fetched the files of every collection. It now finds the
named files through the new `freshFilesByID` in `src/cli-read.ts`, by the
rule `freshFile` follows. On an empty cache it reads the collection list,
then one collection's files at a time, and stores none of the collections
or file records it reads. It searches the most recently updated
collection first. So a file in several albums is still named after the
first of them that `Library.albums.list()` lists. `fixMissingThumbnails`
now takes the records the command found, and fetches each original
through `lib.originalOf()`.

Model: opus-5-5

TODO.md

@@ -26,6 +26,15 @@ declares one.
 
 # Completed Steps
 
+- 2026-10-26: On an empty cache, `quak helper fix-missing-thumbnails --file`
+  stops fetching collections' files once it finds every file it names
+  (https://git.eeqj.de/sneak/quak/issues/223). It used to wait for a refresh,
+  which on an empty cache fetched the files of every collection. Now it reads
+  the collection list, then one collection's files at a time, the most recently
+  updated first. It stores none of the collections or file records it reads. It
+  fetches each original through `lib.originalOf()`, which keeps it in the cache.
+  Once the cache holds the account's collections, it still waits for a refresh.
+
 - 2026-10-26: On an empty cache, `quak get` and `quak get-thumb` stop fetching
   collections' files once they find the file
   (https://git.eeqj.de/sneak/quak/issues/222). They used to wait for a refresh,