fix: Resolve 500/404 cascade — JWT tenant context, wipe routes, changelog stub

Root cause: super_admin JWT returned early with no license_id, causing
@CurrentTenant() to pass undefined to every tenant-scoped service query.

- jwt.strategy: Move license lookup before super_admin early return so
  admins who own licenses get their license_id in the JWT payload
- CurrentTenant decorator: Throw 401 with clear message when license_id
  is undefined instead of letting undefined cascade into TypeORM queries
- Wipe store: Fix 6 wrong routes (/profiles → /wipes/profiles, etc.)
  and remove redundant manual license_id guards
- Changelog module: Add stub controller/service returning empty array
  to eliminate 404 on /api/changelog
- ChangelogView: Handle both array and {entries} response shapes
- AGENTS.md: Streamlined 3-tier roster (Opus/Sonnet/Haiku)

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

backend-nest/src/modules/changelog/changelog.controller.ts

@@ -0,0 +1,24 @@
+import { Controller, Get, Query } from '@nestjs/common';
+import { ApiTags, ApiOperation, ApiQuery } from '@nestjs/swagger';
+import { ChangelogService } from './changelog.service';
+import { Public } from '../../common/decorators/public.decorator';
+
+@ApiTags('changelog')
+@Controller('changelog')
+export class ChangelogController {
+  constructor(private readonly changelogService: ChangelogService) {}
+
+  @Get()
+  @Public()
+  @ApiOperation({ summary: 'Get changelog entries' })
+  @ApiQuery({ name: 'page', required: false, type: Number })
+  @ApiQuery({ name: 'limit', required: false, type: Number })
+  async getEntries(
+    @Query('page') page?: string,
+    @Query('limit') limit?: string,
+  ) {
+    const p = parseInt(page || '1', 10);
+    const l = parseInt(limit || '20', 10);
+    return this.changelogService.getEntries(p, l);
+  }
+}

backend-nest/src/modules/changelog/changelog.module.ts

@@ -0,0 +1,9 @@
+import { Module } from '@nestjs/common';
+import { ChangelogController } from './changelog.controller';
+import { ChangelogService } from './changelog.service';
+
+@Module({
+  controllers: [ChangelogController],
+  providers: [ChangelogService],
+})
+export class ChangelogModule {}

backend-nest/src/modules/changelog/changelog.service.ts

@@ -0,0 +1,21 @@
+import { Injectable } from '@nestjs/common';
+
+export interface ChangelogEntry {
+  id: string;
+  version: string;
+  title: string;
+  description: string;
+  type: 'feature' | 'fix' | 'improvement' | 'breaking';
+  created_at: string;
+}
+
+@Injectable()
+export class ChangelogService {
+  async getEntries(
+    page: number,
+    limit: number,
+  ): Promise<{ entries: ChangelogEntry[]; total: number }> {
+    // Stub — returns empty until changelog entries are seeded or managed
+    return { entries: [], total: 0 };
+  }
+}