Migrate views to Odoo 17/18 syntax; fix pre-existing XML blockers

- Convert all 124 attrs="{...}" across 13 view files to direct Odoo 17/18
  attributes (invisible/readonly/required with Python expressions); prefix-domain
  OR/AND/NOT and operators handled (e.g. "(is_overdue or days_until_due > 7) and completed")
- Fix pre-existing XML errors that blocked module load on any version:
  - Replace invalid   HTML entity with   in 4 files (reports + portal)
  - Merge duplicate style= attributes (3 spots in website_intake_templates)
  - Replace 3 illegal <t t-if> embedded in class="" attributes with t-attf-class
- All 44 module XML files now parse clean

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

activeblue_familylaw/views/fl_caselaw_views.xml

@@ -24,7 +24,7 @@
                 <form string="Case Law">
                     <sheet>
                         <div class="alert alert-warning" role="alert"
-                             attrs="{'invisible': [('superseded_by_2023_reform', '=', False)]}">
+                             invisible="not superseded_by_2023_reform">
                             <strong>⚠️ NOTE:</strong> This case involves permanent alimony
                             which was <strong>eliminated by HB 1409 (effective July 1, 2023)</strong>.
                             Pre-2023 permanent alimony holdings may not apply to new cases.