feat: persist columns to localStorage, custom fields as columns

- Column config saves to localStorage on every change
- Load from localStorage on mount (survive reloads without saved view)
- Custom fields appear as column options in picker
- Custom field values render in ticket rows
- Backend now always includes custom_fields in GET /tickets response

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/routes/tickets.ts

@@ -110,6 +110,45 @@ export function createTicketsRouter(db: Db): Hono {
       );
     }
 
+    // Attach custom field values to all tickets
+    if (filtered.length > 0) {
+      const ticketIds = filtered.map((t) => t.id);
+      const allCfValues = await db.query.customFieldValues.findMany({
+        where: (table, { inArray }) => inArray(table.ticket_id, ticketIds),
+      });
+      const fieldIds = [...new Set(allCfValues.map((v) => v.custom_field_id))];
+      const allFields = fieldIds.length > 0
+        ? await db.query.customFields.findMany({
+            where: (table, { inArray }) => inArray(table.id, fieldIds),
+          })
+        : [];
+      const fieldMap = new Map(allFields.map((f) => [f.id, f]));
+
+      const ticketsWithCf = filtered.map((ticket) => {
+        const cfs = allCfValues
+          .filter((v) => v.ticket_id === ticket.id)
+          .map((v) => ({
+            id: v.id,
+            custom_field_id: v.custom_field_id,
+            ticket_id: v.ticket_id,
+            value: v.value,
+            created_at: v.created_at?.toISOString(),
+            custom_field: fieldMap.has(v.custom_field_id) ? {
+              id: v.custom_field_id,
+              key: fieldMap.get(v.custom_field_id)!.key,
+              name: fieldMap.get(v.custom_field_id)!.name,
+              field_type: fieldMap.get(v.custom_field_id)!.field_type,
+              values: fieldMap.get(v.custom_field_id)!.values,
+              max_values: fieldMap.get(v.custom_field_id)!.max_values,
+              pattern: fieldMap.get(v.custom_field_id)!.pattern,
+            } : undefined,
+          }));
+        return { ...ticket, custom_fields: cfs };
+      });
+
+      return c.json(ticketsWithCf);
+    }
+
     return c.json(filtered);
   });