refactor(time): app-wide setting-aware TimeField for all time inputs

Add shared components/common/TimeField (displays per general_time_format,
stores canonical HH:MM, parses tolerant free-text, browser-independent)
and migrate every native <input type="time"> to it: business hours,
HoursSection, HourEntryInlinePopover, CreateEventPage, Quote/Bill/Contract
editors. Removes the unreliable lang-hint plumbing.

backend/migrations/core/116_backfill_imported_paid_amount.js

@@ -0,0 +1,37 @@
+/**
+ * Migration: backfill paid_amount_minor for imported PAID invoices that
+ * stored 0.
+ *
+ * Background: the historical-invoice import only sent paidAmountMinor when
+ * the admin separately filled the "paid amount" field. Left blank (easy to
+ * miss — the total was already entered), it stored paid_amount_minor = 0
+ * even with status='paid'. The dashboard revenue windows sum
+ * paid_amount_minor (not total), so those paid imports contributed NOTHING
+ * to revenue. The import route now defaults a blank paid amount to the
+ * total; this fixes the rows already created before that change.
+ *
+ * Scope: imported (imported_pdf_path set) + status='paid' + paid_amount_minor
+ * 0/null → set paid_amount_minor = total_amount_minor (fully paid). Operational
+ * payment field, not immutable legal content (same reasoning as migration 111).
+ *
+ * Idempotent: re-running sets the same value; rows already > 0 are untouched.
+ */
+
+exports.up = async function(knex) {
+  if (!(await knex.schema.hasTable('invoices'))) return;
+  if (!(await knex.schema.hasColumn('invoices', 'imported_pdf_path'))) return;
+  if (!(await knex.schema.hasColumn('invoices', 'paid_amount_minor'))) return;
+
+  await knex('invoices')
+    .whereNotNull('imported_pdf_path')
+    .where('status', 'paid')
+    .andWhere(function() {
+      this.where('paid_amount_minor', 0).orWhereNull('paid_amount_minor');
+    })
+    .update({ paid_amount_minor: knex.raw('total_amount_minor') });
+};
+
+exports.down = async function() {
+  // Irreversible data backfill — we can't tell which rows we changed apart
+  // from legitimately-full payments. No-op.
+};

backend/src/routes/adminInvoices.js

@@ -471,8 +471,15 @@ router.post(
     }
 
     const totalMinor = parseInt(req.body.totalAmountMinor, 10);
-    const paidMinor  = parseInt(req.body.paidAmountMinor || '0', 10) || 0;
     const status     = req.body.status || 'sent';
+    // A paid import with no explicit paid amount means FULLY paid — default
+    // paid_amount_minor to the total. The dashboard revenue windows sum
+    // paid_amount_minor (not total), so a blank paid amount used to store 0
+    // and the paid invoice contributed nothing to revenue.
+    const explicitPaid = req.body.paidAmountMinor != null && String(req.body.paidAmountMinor) !== '';
+    const paidMinor  = explicitPaid
+      ? (parseInt(req.body.paidAmountMinor, 10) || 0)
+      : (status === 'paid' ? totalMinor : 0);
     const issueDate  = req.body.issueDate;
     const dueDate    = req.body.dueDate || issueDate;
     // Imported docs are historical: their real send/payment dates are