chore: harden config, strengthen frontend typing, fix UTF-8 mojibake

Security config (3.1):
- config/session.ts: cookie.secure now follows app.inProduction instead of
  being hardcoded to false
- config/shield.ts: enable CSP with baseline directives compatible with
  Vite dev server and Inertia (self + @viteDevUrl/@viteHmrUrl)

Frontend typing (3.2):
- Replace 'any' props with concrete types (Computer, Component, ComponentType,
  ComputerState) across computers/*.vue and components/*.vue, using the
  existing inertia/pages/types/UITypes.ts definitions
- Fix UITypes.ts: export ComponentType/ComputerState, switch from interface
  to type (interfaces are never assignable to Inertia's ComponentProps index
  signature), drop the stale componentTypeId/componentStateId fields that
  didn't match the actual Lucid schema (real field is typeId, no component
  state exists)
- Add an asPageProp() boundary cast in the two controllers: Lucid's
  serialize() returns a loosely typed ModelObject that isn't structurally
  assignable to the concrete page prop shapes (and the inertia/** tree is
  excluded from the backend tsconfig, so real types can't be imported
  directly across that boundary)

UTF-8 mojibake fixes (3.3):
- Repair broken accented characters (├®/├á/├┤ -> é/à/ô, Ôé¼ -> €) left over
  from a bad encoding during the GWT->Inertia migration, across
  ComponentEditor.vue, ComputerComponentsTable.vue, SimpleGallery.vue,
  TableComponent.vue, isAdminMode.ts and the custom directives

Misc cleanup (3.5):
- computer.ts: replace console.warn with the app logger (includes
  computerId) when .cost is accessed without preloading components

inertia/composables/isAdminMode.ts

@@ -1,9 +1,9 @@
 import { ref, watch } from 'vue'
 
-// Cr├®er une r├®f├®rence pour isAdminActive
+// Créer une référence pour isAdminActive
 const isAdminActive = ref(JSON.parse(localStorage.getItem('isAdminActive') || 'false'))
 
-// Surveiller les changements de isAdminActive et mettre à jour localStorage
+// Surveiller les changements de isAdminActive et mettre à jour localStorage
 watch(isAdminActive, (newValue) => {
   localStorage.setItem('isAdminActive', JSON.stringify(newValue))
 })