Add timesheet / AI-audit time tracking (wraps account.analytic.line)

- fl.timesheet via delegation inheritance on account.analytic.line so billable
  hours flow through standard Odoo Accounting; duration_hours maps to unit_amount
- Fields: case_id, employee_id, is_billable, ai_agent, duration_hours, computed
  hourly_rate/billable_amount (rate from hr.employee.fl_hourly_rate, else firm
  default ir.config_parameter fl_timesheet.default_hourly_rate)
- _resolve_analytic_account: prefers the case project's analytic account
  (version-agnostic field lookup), falls back to a cached firm account under any
  available analytic plan — handles the required account_id on the wrapped line
- Add 'analytic' to manifest depends; ACL for fl.timesheet and account.analytic.line
  (admin + paralegal) so non-admins can post entries
- fl.case: timesheet_ids + total_billable_hours/amount + total_ai_audit_hours +
  currency_id; new Time & Billing tab; Timesheets menu + standalone views
- Both AI agents now log non-billable audit entries via sudo() (paralegal +
  attorney, ai_agent set); logging stays a guarded no-op if creation fails

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

activeblue_familylaw/views/menu_views.xml

@@ -94,6 +94,13 @@
             action="action_fl_conflict_check_list"
             sequence="70"/>
 
+        <menuitem
+            id="menu_fl_timesheets"
+            name="Timesheets"
+            parent="menu_fl_cases"
+            action="action_fl_timesheet_list"
+            sequence="80"/>
+
         <!-- ══════════════════════════════════════════════════════
              SUPPORT CALCULATOR SUB-MENU
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