Changelog und Hilfeseite für Bibliothekswahl und Druckverlauf

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01BNhLunz586g6DeYMa7Qsd1

CHANGELOG.md

@@ -2,6 +2,44 @@
 
 All notable changes to Klarbild are documented here. Newest first.
 
+## 2026-09-01 (later) — Printing from the library, and a print history
+
+### Added
+- **Pick images from the library** in the print area. Until now a file had to be
+  uploaded even when Klarbild already had it — a studio result went to disk and back
+  through the uploader. The picker has search (filename and description), a folder
+  filter and multi-select, reachable from the empty tray, from the card header and from
+  each cell group. Only finished, visible images are offered, under the same rules as
+  the library itself.
+- **Last printed** (card 4 on `/drucken`): what was printed recently, with a button to
+  produce the exact same sheet again. **Only the instruction is stored, never the PDF** —
+  an A3 sheet runs to 20–80 MB, an entry to 1–3 KB. That works because the print module
+  computes without a model: the same job yields the same sheet. Verified — two runs of
+  one configuration produced PDFs differing *only* in `CreationDate` and `ModDate`; the
+  image streams are byte-identical. Repeat is offered only when every cell came from the
+  library and every image still exists; otherwise the entry says which of the two reasons
+  applies. The last 100 runs per account are kept, older ones drop off by themselves.
+  You see your own runs; admins see all.
+- **Mail access from the server environment.** Sending now falls back to `SMTP_*`
+  environment variables when nothing is entered under Admin → E-mail, so a fresh install
+  can send straight away — and with it, password reset works. Credentials live in Coolify,
+  never in the repo. The admin card says which source is actually in effect.
+
+### Fixed
+- The run summary listed every cell separately: "10 × 15 cm, 10 × 15 cm". Identical sizes
+  are now merged and their counts added. The first attempt turned "13 × 18 cm" into
+  "13 cm ×18" — the × inside a measurement looked like a count. Anchored to the end of the
+  line now, with seven tests holding it there.
+- "1 image is missing" for a sheet whose source was simply an upload: one counter was
+  serving two different causes. Two counters, two explanations.
+- "the PDF was 0.0 MB" for a 20 KB sheet — below a megabyte it now counts in KB.
+- A file missing from disk showed the browser's broken-image icon in the picker and the
+  history. The tile stays quiet now, and still clickable.
+- On narrow screens the right-hand column was pulled to the top (`order: -1`, so the
+  preview is visible straight away). With a fourth card you would have scrolled past a
+  whole block before reaching the upload area. The cards now run in their own numbering —
+  and the numbers in the card headers are visible again, because they are correct again.
+
 ## 2026-09-01 — Sharing, e-mail, password reset, and a security pass
 
 ### Added