feat(web): English paths, and a portfolio that updates itself

/cartera, /explorar and /p/:key/proponer are /portfolio, /explore and
/p/:key/propose now, like every other path; the Spanish ones redirect,
so links already shared keep working. Settings sections go by
?section= with English names.

The portfolio reads itself again, quietly, when a ticket, sprint or
release of the projects shown changes, when my projects change, or when
the live connection comes back; «En directo» replaces the refresh
button.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

libs/api/tracker/presenters/src/lib/http/dto/responses.dto.ts

@@ -361,7 +361,7 @@ class ShowcaseProposalsDto {
   @ApiProperty({
     type: String,
     nullable: true,
-    example: '/p/WEB/proponer',
+    example: '/p/WEB/propose',
     description: 'The form in the web app, while it takes them',
   })
   path!: string | null;