Merge PR #2506: Edit Capture Time leaves a capture time it can't fully read

# Conflicts:
#	crates/ui-egui/src/lib.rs
#	docs/parity-checklist.md
#	docs/whats-new.md

docs/parity-checklist.md

@@ -113,7 +113,7 @@ differences and missing bindings are in [ui-parity.md](ui-parity.md#shortcuts).
 | LR-LIB-REMOVE-ALBUM | Remove from album | P0 | ✅ | `cmd:album.removePhotos`, `crates/engine/src/tests_album_remove.rs`, `crates/ui-egui/src/tests_album_remove.rs` | changes the album only: the photos stay in the library, their library folder and their folder on disk (issue #1805); `id` defaults to the album on screen; returns `{removed, album}`. In a normal album ⌫ removes from the album (as in Lightroom; no confirmation, one undo step), in a smart album it changes nothing and says to edit its rules |
 | LR-LIB-DUPLICATE | Duplicate a photo | P2 | ✅ | `cmd:photo.duplicate` | Photo ▸ Duplicate: a real `-copy` file with the same settings, metadata and albums (virtual copies share the file) |
 | LR-LIB-RENAME | Batch rename | P1 | ✅ | `cmd:photo.rename`, `cmd:photo.renamePreview`, `cmd:photo.renameTokens`, `cmd:dialog.rename`, `crates/engine/src/rename.rs` (`TOKENS`) | template tokens {name} {num} {seq:N} {date:%Y%m%d} {folder} {camera} {lens} {iso} {rating} {title} {creator} {ext} (shared with export naming and import rename); a Tags picker beside every template field (Rename Photos, import Rename, export File name) lists each tag with meaning + live example, the date directives and the rules, and inserts the clicked tag at the text cursor; unknown tags are flagged; preview; renames files on disk with their XMP sidecars (a stem sidecar another file still shares, e.g. raw + JPEG, is copied rather than taken), never overwriting (-1, -2… suffixes; a change of letter case only is checked by file identity, so on case-sensitive volumes `img_1.jpg` next to `IMG_1.JPG` is a collision), rolls back on failure (a file that can't be moved back is reported old → new and the library follows it as an undoable partial rename; the same for undo/redo); undo/redo move the files; virtual copies follow |
-| LR-LIB-CAPTURETIME | Edit capture time | P1 | ✅ | `cmd:photo.setCaptureTime`, `cmd:dialog.captureTime`, `crates/catalog/src/dates.rs` | set (the other selected photos shift by the same amount, or `each`), shift by days/hours/minutes, time-zone shift; one undo step, journaled; Info panel button; no “revert to original capture time”. Impossible calendar dates cannot anchor relative shifts; rejection preserves metadata, selection, Undo and Redo. |
+| LR-LIB-CAPTURETIME | Edit capture time | P1 | ✅ | `cmd:photo.setCaptureTime`, `cmd:dialog.captureTime`, `crates/catalog/src/dates.rs` | set (the other selected photos shift by the same amount, or `each`), shift by days/hours/minutes, time-zone shift; one undo step, journaled; Info panel button; no “revert to original capture time”. Impossible calendar dates cannot anchor relative shifts; rejection preserves metadata, selection, Undo and Redo. A capture time that doesn't fully read (cut short, or text after it) is left as it is and counted (`unreadable`); it can't anchor a set that moves other photos, and set alone repairs it. |
 | LR-LIB-SHOWFINDER | Reveal original in file manager | P0 | ✅ | `cmd:app.showInFinder` | ⌘R (see MENU-FILE-SHOWFINDER) |
 | LR-LIB-COVER | Album cover | P2 | ✅ | `cmd:album.setCover` | |
 | LR-LIB-CULL | Assisted culling | P2 | 🟡 | `cmd:photo.analyze`, `cmd:dialog.cull`, `crates/pipeline/src/cull.rs` | Photo ▸ Assisted Culling…: focus score (0–100), clipping, burst grouping (look-alike shots within 10 s, both limits adjustable in the dialog and as `burstGap` / `similarity`, #2275) with the sharpest marked; reject below a focus score, pick each burst's best; classical measures — no eyes-closed / expression detection |
@@ -813,6 +813,7 @@ Latin stays upright. Advanced Japanese composition remains open. Regression cove
 | 2026-10-20 | minor | LR-PRE-PANEL: the preset applied to a photo is marked again (with its Amount slider) on returning to the photo, until the photo is edited further (#2392); status unchanged (✅) |
 | 2026-10-20 | minor | LR-MASK-OVERLAY: creating, picking, duplicating or adding to a mask shows the overlay a mask slider hid (#1800); status unchanged (✅) |
 | 2026-10-20 | patch | LRC-LIB-COMPARE, LR-VIEW-SURVEY: in Compare and Survey the Info panel's stars and colour labels and the Set Color Label menu act on the active photo only (they labelled the whole selection), and the panes show the colour label (#2398); statuses unchanged |
+| 2026-10-21 | patch | LR-LIB-CAPTURETIME: a capture time that doesn't fully read is left as it is and counted (`unreadable`) instead of shifted into a wrong one; it can't anchor a set that moves other photos; status unchanged |
 | 2026-10-20 | patch | LR-VIEW-ZOOM: the 20 ms rule clears a slow-drag verdict only on a drag timed at full size; a drag that drafts small leaves it unchanged, as the code does; status unchanged |
 | 2026-10-19 | patch | LR-CROP-RECT: on a straightened photo a moved crop slides along the tilted edges, so a box that fills the photo's height reaches its sides (#2299); status unchanged |
 | 2026-10-19 | patch | LR-VIEW-ZOOM: the slow slider-drag verdict is described as per photo and control, as the code keys it; status unchanged |

docs/whats-new.md

@@ -87,6 +87,15 @@
   or "doesn't contain" rule took about 17 ms per pass instead of about 62 ms, around 3.5 times faster, with the same
   photos matched; about 6 ms of that is only reading the paths. Paths and rule text with letters beyond A–Z are
   compared as before.
+## 2026-10-21
+
+### Edit Capture Time leaves a capture time it can't read as it was
+- A capture time that is cut short, has seconds that aren't digits or has text after it (a Lightroom catalog's capture
+  time is copied as it is) is no longer shifted into a clean-looking wrong time: Edit Capture Time leaves the photo as
+  it was and says so, and its preview says the photo's time can't be read instead of previewing a wrong one.
+  `photo.setCaptureTime` counts those photos as `unreadable`. Set date & time still repairs such a photo selected on
+  its own; with other photos selected it says why it can't move them by the same amount. When the dialog can't make a
+  change (a time that isn't a date, a shift past year 9999), it now says why and stays open, instead of closing.
 
 ## 2026-10-19