Align repo config with global development standards

- Add missing tsconfig strictness flags (noUncheckedIndexedAccess,
  exactOptionalPropertyTypes, noImplicitOverride,
  noPropertyAccessFromIndexSignature) and fix all resulting type errors
- Replace ESLint/Prettier with oxlint 1.48.0 and oxfmt 0.33.0
- Pin all frontend and backend dependencies to exact versions
- Pin GitHub Actions to SHA hashes with persist-credentials: false
- Fix CI Python version mismatch (3.12 -> 3.14) and ruff target-version
- Add vitest 4.0.18 with jsdom environment for frontend testing
- Add ty 0.0.17 for Python type checking (non-blocking in CI)
- Add actionlint and zizmor CI job for workflow linting and security audit
- Add Dependabot config for npm, pip, and github-actions
- Update CLAUDE.md and pre-commit hooks to reflect new tooling
- Ignore Claude Code sandbox artifacts in gitignore

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

frontend/src/components/admin/RouteEncounterFormModal.tsx

@@ -1,11 +1,7 @@
 import { type FormEvent, useState } from 'react'
 import { FormModal } from './FormModal'
 import { PokemonSelector } from './PokemonSelector'
-import {
-  METHOD_ORDER,
-  METHOD_CONFIG,
-  getMethodLabel,
-} from '../EncounterMethodBadge'
+import { METHOD_ORDER, METHOD_CONFIG, getMethodLabel } from '../EncounterMethodBadge'
 import type {
   RouteEncounterDetail,
   CreateRouteEncounterInput,
@@ -14,9 +10,7 @@ import type {
 
 interface RouteEncounterFormModalProps {
   encounter?: RouteEncounterDetail
-  onSubmit: (
-    data: CreateRouteEncounterInput | UpdateRouteEncounterInput
-  ) => void
+  onSubmit: (data: CreateRouteEncounterInput | UpdateRouteEncounterInput) => void
   onClose: () => void
   isSubmitting?: boolean
   onDelete?: () => void
@@ -38,15 +32,10 @@ export function RouteEncounterFormModal({
   const [selectedMethod, setSelectedMethod] = useState(
     isKnownMethod ? initialMethod : initialMethod ? 'other' : ''
   )
-  const [customMethod, setCustomMethod] = useState(
-    isKnownMethod ? '' : initialMethod
-  )
-  const encounterMethod =
-    selectedMethod === 'other' ? customMethod : selectedMethod
+  const [customMethod, setCustomMethod] = useState(isKnownMethod ? '' : initialMethod)
+  const encounterMethod = selectedMethod === 'other' ? customMethod : selectedMethod
 
-  const [encounterRate, setEncounterRate] = useState(
-    String(encounter?.encounterRate ?? '')
-  )
+  const [encounterRate, setEncounterRate] = useState(String(encounter?.encounterRate ?? ''))
   const [minLevel, setMinLevel] = useState(String(encounter?.minLevel ?? ''))
   const [maxLevel, setMaxLevel] = useState(String(encounter?.maxLevel ?? ''))
 
@@ -87,9 +76,7 @@ export function RouteEncounterFormModal({
         />
       )}
       <div>
-        <label className="block text-sm font-medium mb-1">
-          Encounter Method
-        </label>
+        <label className="block text-sm font-medium mb-1">Encounter Method</label>
         <select
           required
           value={selectedMethod}
@@ -126,9 +113,7 @@ export function RouteEncounterFormModal({
         )}
       </div>
       <div>
-        <label className="block text-sm font-medium mb-1">
-          Encounter Rate (%)
-        </label>
+        <label className="block text-sm font-medium mb-1">Encounter Rate (%)</label>
         <input
           type="number"
           required