feat(analytics): show form field labels in session replays (#1416)

* feat(analytics): show form field labels in session replays

Replays showed the sidebar after #1412 but form pages were still fully
masked, so you could not tell WHICH field a user was interacting with.
Tag the shared Label primitive (components/ui/label.tsx, used by every
form in the app) with data-ph-unmask: field labels are static i18n
chrome, and maskAllInputs keeps every typed value hidden.

The one Label whose text is user data, the user-defined dimension name
in LineDimensionFields, gets data-ph-mask, which wins even on the same
element because maskTextFn checks it first.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

* fix(analytics): re-mask three Labels that render user data

Completing the audit the PR review asked for: a multiline sweep over
every Label child found three call sites whose label text is user
data, missed by the first single-line pass. Danger-zone confirm
labels interpolate the user's email (AccountDangerZone) and the
company name (CompanyDangerZone), and the periodisering auto-detect
row label is counterparty name + invoice number. All three now carry
data-ph-mask. Currency-code and row-count interpolations were
reviewed and left visible: categorical UI state, not books data.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

---------

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

components/dimensions/LineDimensionFields.tsx

@@ -74,7 +74,8 @@ export default function LineDimensionFields({
     <div className={stacked ? 'space-y-3' : 'grid grid-cols-2 gap-3'}>
       {fields.map((field) => (
         <div key={field.sieDimNo}>
-          <Label className="text-xs text-muted-foreground">{field.label}</Label>
+          {/* data-ph-mask: the label is the user's own dimension name, not chrome */}
+          <Label data-ph-mask="" className="text-xs text-muted-foreground">{field.label}</Label>
           <div className="mt-1">
             <DimensionCombobox
               sieDimNo={field.sieDimNo}