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/ui/label.tsx

@@ -14,8 +14,13 @@ const Label = React.forwardRef<
   React.ComponentPropsWithoutRef<typeof LabelPrimitive.Root> &
     VariantProps<typeof labelVariants>
 >(({ className, ...props }, ref) => (
+  // data-ph-unmask: form field labels are static i18n chrome, so session
+  // replays show WHICH field is being filled in while the typed value stays
+  // masked (see instrumentation-client.ts). A call site whose label text is
+  // user data must add data-ph-mask, which wins over this default.
   <LabelPrimitive.Root
     ref={ref}
+    data-ph-unmask=""
     className={cn(labelVariants(), className)}
     {...props}
   />