feat(mood): capture the five values without lengthening the quick check-in

- the five faces are untouched: pick one, save, done in a tap
- a closed section below them opens onto five sliders; picking a face
  suggests a pleasantness value and moving that slider takes the
  suggestion over, while the face selection stays where it is
- an untouched slider writes nothing, and clearing one takes the answer
  back rather than leaving a middle value behind
- the list's edit dialog shows and changes the same five, so nothing is
  written on one screen and invisible on the other
- correcting an entry no longer re-derives pleasantness when the label
  did not move, which used to overwrite a hand-set value on any edit
- factor ratings are no longer offered on a new entry and nothing was
  deleted: existing ratings still render, edit and feed the crosstab
- six locales, and the dimension table's keys are declared dynamic

src/app/api/mood-entries/[id]/route.ts

@@ -128,8 +128,13 @@ export const PUT = apiHandler(
       updateData.score = getScoreForMood(data.mood);
       // v1.37 — pleasantness follows the label the same way `score` does, so
       // an entry corrected from "okay" to "bad" cannot keep yesterday's A1.
-      // An explicit `a1` in the same request overrides it below.
-      updateData.moodA1 = deriveA1(data.mood);
+      // Only when the label actually moved, though: the edit dialog sends the
+      // whole entry back on every save, and re-deriving on an unchanged label
+      // would overwrite a value the person set by hand every time they
+      // corrected the timestamp. An explicit `a1` below overrides either way.
+      if (data.mood !== existing.mood) {
+        updateData.moodA1 = deriveA1(data.mood);
+      }
     }
     // v1.37 — level-A values are per-field on this path: omitted keeps the
     // stored value, an explicit number replaces it, an explicit null clears