chore(frontend): fix ESLint, add Pint+ESLint pre-commit hook, centralize v-html

Fix the broken ESLint setup: add vue-eslint-parser and @typescript-eslint/parser
and wire the TS parser into eslint.config.mjs so .ts and <script lang=ts> parse
(was failing outright). Clear the resulting backlog to a clean 0/0 baseline —
fix genuine issues, relax two intentional-pattern rules (multi-word-component-names,
no-required-prop-with-default).

Add a committed .githooks/pre-commit (enabled via core.hooksPath, auto-set by the
prepare script) that runs Pint on staged PHP and ESLint --max-warnings 0 on staged
resources/scripts JS/TS/Vue, blocking on failure. Add composer/npm lint scripts and
document the gate in CLAUDE.md.

Replace every scattered v-html with a single audited BaseSanitizedHtml component
that DOMPurify-sanitizes its input (new utils/markdown.ts sanitizeHtml), so
server/registry-provided HTML is actually sanitized and vue/no-v-html stays enabled
everywhere but one reviewed sink.

resources/scripts/features/shared/document-form/DocumentItemRowTax.vue

@@ -15,7 +15,7 @@
         searchable
         object
         label="name"
-        @update:modelValue="onSelectTax"
+        @update:model-value="onSelectTax"
       >
         <template #singlelabel="{ value }">
           <div class="absolute left-3.5">

resources/scripts/features/shared/document-form/DocumentTotals.vue

@@ -161,7 +161,7 @@
       v-if="formData.tax_per_item === 'NO' || formData.tax_per_item === null"
     >
       <div
-        v-for="(tax, index) in taxes"
+        v-for="tax in taxes"
         :key="tax.id"
         class="flex items-center justify-between w-full mt-2 text-sm"
       >

resources/scripts/features/shared/document-form/NoteSelectPopup.vue

@@ -2,7 +2,7 @@
   <div>
     <NoteModal />
     <div class="w-full">
-    <Popover v-slot="{ open: isOpen }">
+    <Popover>
       <PopoverButton
         v-if="canViewNotes"
         class="flex items-center z-10 font-medium text-primary-400 focus:outline-hidden focus:border-none"

resources/scripts/features/shared/document-form/TaxSelectPopup.vue

@@ -1,6 +1,6 @@
 <template>
   <div class="w-full mt-4 tax-select">
-    <Popover v-slot="{ open: isOpen }" class="relative">
+    <Popover class="relative">
       <PopoverButton
         class="flex items-center text-sm font-medium text-primary-400 focus:outline-hidden focus:border-none"
       >