feat(moderation): appeals (6c) + Discord reversal on approve (6d)

Players whose linked Discord identity was banned or muted can now submit
an appeal from the portal and track it; staff get a queue in the admin
moderation section to claim and resolve (approve/deny) appeals. Approving
a ban/mute appeal best-effort asks the Discord bot to reverse the action
(unban / clear timeout) via the internal API and posts a mod-log embed; a
down bot never fails the resolution (reversal_status is recorded).

- Schema: new server-owned `appeals` table (no cross-owner FK to
  mod_actions; existence validated in app code).
- Server: model/appeals/* + player appeals controller (submit/mine/
  eligible/withdraw) and admin queue handlers (list/claim/resolve/
  per-user) under the existing admin+moderator gate; one-active-appeal
  enforced app-side; eligibility keyed on the caller's linked Discord id.
- 6d: bot POST /internal/mod-reverse (+ modLog.postReversal) and
  server botInternalClient.reverseModAction, wired into resolve().
- Client: admin Appeals queue + resolve modal, ModerationUser appeals
  tab, player Appeals page (submit/withdraw), nav + routes + api methods.
- Docs: swagger annotations + component schemas, regenerated output.
- Tests: appeals controller + pure suites (server npm test 224 green).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01XmHdsbnLzDMAVQkAoTQSBe

server/src/router/v1/player/player.routes.js

@@ -11,6 +11,7 @@ const { body, param } = require('express-validator')
 
 const account = require('../admin/account.controller')
 const shard = require('./shard.controller')
+const appeals = require('./appeals.controller')
 const { requireAuth, requireRole } = require('../../../auth/session.middleware')
 const noindex = require('../../../middleware/noindex')
 const validate = require('../../../middleware/validate')
@@ -232,4 +233,58 @@ playerRouter.get(
   shard.getHouses,
 )
 
+// ── Moderation appeals (uo-link / Discord moderation) ──────────────────────
+// A player appeals one of their own ban/mute mod_actions. Ownership is proven by
+// matching the action against the caller's linked Discord identity.
+playerRouter.get(
+  '/appeals',
+  // #swagger.tags = ['Player · Appeals']
+  // #swagger.summary = 'List the caller’s moderation appeals'
+  // #swagger.security = [{ "cookieAuth": [] }, { "bearerAuth": [] }]
+  /* #swagger.responses[200] = { description: 'The caller’s appeals', content: { "application/json": { schema: { type: "array", items: { $ref: "#/components/schemas/Appeal" } } } } } */
+  /* #swagger.responses[403] = { description: 'Player role required, or account not active', content: { "application/json": { schema: { $ref: "#/components/schemas/Error" } } } } */
+  appeals.listMine,
+)
+playerRouter.get(
+  '/appeals/eligible',
+  // #swagger.tags = ['Player · Appeals']
+  // #swagger.summary = 'List the caller’s ban/mute actions eligible for appeal'
+  // #swagger.description = 'The caller’s ban/mute mod_actions that have no active appeal. Returns an empty array when the caller has no linked Discord account (the UI shows a “link Discord” hint).'
+  // #swagger.security = [{ "cookieAuth": [] }, { "bearerAuth": [] }]
+  /* #swagger.responses[200] = { description: 'Appealable actions', content: { "application/json": { schema: { type: "array", items: { $ref: "#/components/schemas/AppealEligibleAction" } } } } } */
+  /* #swagger.responses[403] = { description: 'Player role required, or account not active', content: { "application/json": { schema: { $ref: "#/components/schemas/Error" } } } } */
+  appeals.listEligible,
+)
+playerRouter.post(
+  '/appeals',
+  // #swagger.tags = ['Player · Appeals']
+  // #swagger.summary = 'Submit a moderation appeal for one of the caller’s actions'
+  // #swagger.description = 'Opens an appeal for a ban/mute mod_action that belongs to the caller (its target matches the caller’s linked Discord identity) and has no active appeal.'
+  // #swagger.security = [{ "cookieAuth": [] }, { "bearerAuth": [] }]
+  /* #swagger.requestBody = { required: true, content: { "application/json": { schema: { $ref: "#/components/schemas/CreateAppealRequest" } } } } */
+  /* #swagger.responses[201] = { description: 'Appeal created', content: { "application/json": { schema: { $ref: "#/components/schemas/Appeal" } } } } */
+  /* #swagger.responses[400] = { description: 'Validation error, or the action type is not appealable', content: { "application/json": { schema: { $ref: "#/components/schemas/ValidationError" } } } } */
+  /* #swagger.responses[403] = { description: 'The action does not belong to the caller', content: { "application/json": { schema: { $ref: "#/components/schemas/Error" } } } } */
+  /* #swagger.responses[404] = { description: 'Mod action not found', content: { "application/json": { schema: { $ref: "#/components/schemas/Error" } } } } */
+  /* #swagger.responses[409] = { description: 'An appeal for this action is already open', content: { "application/json": { schema: { $ref: "#/components/schemas/Error" } } } } */
+  accountChangeLimiter,
+  body('mod_action_id').isInt({ min: 1 }).toInt(),
+  body('submitted_text').isString().trim().isLength({ min: 1, max: 4000 }),
+  validate,
+  appeals.create,
+)
+playerRouter.post(
+  '/appeals/:id/withdraw',
+  // #swagger.tags = ['Player · Appeals']
+  // #swagger.summary = 'Withdraw one of the caller’s pending appeals'
+  // #swagger.security = [{ "cookieAuth": [] }, { "bearerAuth": [] }]
+  // #swagger.parameters['id'] = { in: 'path', required: true, schema: { type: 'integer' }, description: 'Appeal id (must belong to the caller).' }
+  /* #swagger.responses[200] = { description: 'The withdrawn appeal', content: { "application/json": { schema: { $ref: "#/components/schemas/Appeal" } } } } */
+  /* #swagger.responses[404] = { description: 'No such appeal for the caller', content: { "application/json": { schema: { $ref: "#/components/schemas/Error" } } } } */
+  /* #swagger.responses[409] = { description: 'Appeal is already resolved', content: { "application/json": { schema: { $ref: "#/components/schemas/Error" } } } } */
+  param('id').isInt({ min: 1 }),
+  validate,
+  appeals.withdraw,
+)
+
 module.exports = playerRouter