feat: add public read-only sharing for computers

Adds the ability for an owner to share a computer build via a public,
unauthenticated link, inspired by a feature request from the original
pcbuilder repo (no such feature actually existed there — implemented
from scratch here).

- New columns on computers: share_token (unique, nullable), share_enabled,
  share_show_sell_price, share_show_cost
- computer_share_service.ts: generates a non-guessable share token
  (crypto.randomBytes, base64url), enables/disables sharing, and supports
  rotating the token to invalidate previously distributed links
- ComputerShareController (authenticated, owner-scoped like the rest of
  the app): PUT /computers/:id/share to update settings, POST
  /computers/:id/share/rotate to rotate the token
- PublicComputerController + GET /share/:token (outside any auth/guest
  group, reachable anonymously): resolves only computers with
  share_enabled = true, 404 otherwise
- ComputerPublicTransformer: dedicated read-only projection that never
  leaks userId, and only includes sellPrice/cost when the owner opted in
  via share_show_sell_price / share_show_cost — everything else (title,
  scores, state, components, pictures) is always visible on a shared link
- ComputerShareModal.vue: owner-facing UI (toggle sharing, choose which
  prices to expose, copy the public link, revoke/rotate it) wired into
  computers/show.vue via a new 'Share' button
- share/show.vue: public page rendered with EmptyLayout (no authenticated
  header/sidebar)
- Boolean columns use a  cast since MySQL returns tinyint(1),
  not native booleans, through Lucid
- 6 new functional tests covering: enabling sharing, price visibility
  toggles, disabling sharing revokes the link, cross-user protection on
  the share settings endpoint (404), token rotation invalidating the old
  link, and anonymous access to a shared computer

.adonisjs/client/data.d.ts

@@ -6,10 +6,15 @@
 /// <reference path="./manifest.d.ts" />
 import type { InferData, InferVariants } from '@adonisjs/core/types/transformers'
 import type { InferSharedProps } from '@adonisjs/inertia/types'
+import type ComputerPublicTransformer from '#transformers/computer_public_transformer'
 import type UserTransformer from '#transformers/user_transformer'
 import type InertiaMiddleware from '#middleware/inertia_middleware'
 
 export namespace Data {
+  export type ComputerPublic = InferData<ComputerPublicTransformer>
+  export namespace ComputerPublic {
+    export type Variants = InferVariants<ComputerPublicTransformer>
+  }
   export type User = InferData<UserTransformer>
   export namespace User {
     export type Variants = InferVariants<UserTransformer>

.adonisjs/client/registry/index.ts

@@ -84,6 +84,24 @@ const routes = {
     tokens: [{"old":"/computers/:id","type":0,"val":"computers","end":""},{"old":"/computers/:id","type":1,"val":"id","end":""}],
     types: placeholder as Registry['computers.destroy']['types'],
   },
+  'computers.share.update': {
+    methods: ["PUT"],
+    pattern: '/computers/:id/share',
+    tokens: [{"old":"/computers/:id/share","type":0,"val":"computers","end":""},{"old":"/computers/:id/share","type":1,"val":"id","end":""},{"old":"/computers/:id/share","type":0,"val":"share","end":""}],
+    types: placeholder as Registry['computers.share.update']['types'],
+  },
+  'computers.share.rotate': {
+    methods: ["POST"],
+    pattern: '/computers/:id/share/rotate',
+    tokens: [{"old":"/computers/:id/share/rotate","type":0,"val":"computers","end":""},{"old":"/computers/:id/share/rotate","type":1,"val":"id","end":""},{"old":"/computers/:id/share/rotate","type":0,"val":"share","end":""},{"old":"/computers/:id/share/rotate","type":0,"val":"rotate","end":""}],
+    types: placeholder as Registry['computers.share.rotate']['types'],
+  },
+  'share.show': {
+    methods: ["GET","HEAD"],
+    pattern: '/share/:token',
+    tokens: [{"old":"/share/:token","type":0,"val":"share","end":""},{"old":"/share/:token","type":1,"val":"token","end":""}],
+    types: placeholder as Registry['share.show']['types'],
+  },
   'components.index': {
     methods: ["GET","HEAD"],
     pattern: '/components',

.adonisjs/client/registry/schema.d.ts

@@ -163,6 +163,42 @@ export interface Registry {
       errorResponse: ExtractErrorResponse<Awaited<ReturnType<import('#controllers/computers_controller').default['destroy']>>>
     }
   }
+  'computers.share.update': {
+    methods: ["PUT"]
+    pattern: '/computers/:id/share'
+    types: {
+      body: ExtractBody<InferInput<(typeof import('#validators/Computers/share').updateShareSettingsValidator)>>
+      paramsTuple: [ParamValue]
+      params: { id: ParamValue }
+      query: ExtractQuery<InferInput<(typeof import('#validators/Computers/share').updateShareSettingsValidator)>>
+      response: ExtractResponse<Awaited<ReturnType<import('#controllers/computer_share_controller').default['update']>>>
+      errorResponse: ExtractErrorResponse<Awaited<ReturnType<import('#controllers/computer_share_controller').default['update']>>> | { status: 422; response: { errors: SimpleError[] } }
+    }
+  }
+  'computers.share.rotate': {
+    methods: ["POST"]
+    pattern: '/computers/:id/share/rotate'
+    types: {
+      body: {}
+      paramsTuple: [ParamValue]
+      params: { id: ParamValue }
+      query: {}
+      response: ExtractResponse<Awaited<ReturnType<import('#controllers/computer_share_controller').default['rotate']>>>
+      errorResponse: ExtractErrorResponse<Awaited<ReturnType<import('#controllers/computer_share_controller').default['rotate']>>>
+    }
+  }
+  'share.show': {
+    methods: ["GET","HEAD"]
+    pattern: '/share/:token'
+    types: {
+      body: {}
+      paramsTuple: [ParamValue]
+      params: { token: ParamValue }
+      query: {}
+      response: ExtractResponse<Awaited<ReturnType<import('#controllers/public_computer_controller').default['show']>>>
+      errorResponse: ExtractErrorResponse<Awaited<ReturnType<import('#controllers/public_computer_controller').default['show']>>>
+    }
+  }
   'components.index': {
     methods: ["GET","HEAD"]
     pattern: '/components'

.adonisjs/client/registry/tree.d.ts

@@ -20,6 +20,13 @@ export interface ApiDefinition {
     edit: typeof routes['computers.edit']
     update: typeof routes['computers.update']
     destroy: typeof routes['computers.destroy']
+    share: {
+      update: typeof routes['computers.share.update']
+      rotate: typeof routes['computers.share.rotate']
+    }
+  }
+  share: {
+    show: typeof routes['share.show']
   }
   components: {
     index: typeof routes['components.index']