feat: formatted text, a list view, ticket details, public proposals and votes

Formatted text
- Descriptions, comments, replies and release notes render Markdown,
  sanitised with DOMPurify (tested against scripts, handlers and
  javascript: links). A pasted image is uploaded and written as
  ![name](attachment:<id>); the web fetches it with the reader's session,
  so it works on private projects. Every text box has a preview. The
  attachment upload now answers its attachmentId.

List view
- /p/:key/list: every ticket as rows, sortable by any column, filtered by
  text, open/closed, type, priority and assignee; status, priority and
  assignee change in place; bulk edit (the backlog's bar, now shared).

Ticket details
- Reactions on comments (GitHub's eight), for members and viewers.
- Duplicate a ticket: what it says, not where it stands.
- blockedBy: open tickets it waits for (BLOCKS / DEPENDS_ON), worked out
  when reading with one query per board or page; shown on cards, list
  rows and the ticket.

Public proposals
- A public project can take bug reports and ideas from anyone
  (acceptsProposals): POST /api/explore/projects/{project}/proposals and
  the form at /p/:key/proponer. They become tickets labelled «propuesta»,
  opened by TaskStream; a honeypot field and 5 per address every 15
  minutes keep spam out. No e-mail is asked: it would be public.

Votes
- Anyone signed in votes on a public project's tickets, members on a
  private one (voteIssue, PUT/DELETE /api/issues/{issue}/vote): votes and
  voted on each ticket, buttons on the ticket and the roadmap, a column
  in the list. The showcase carries votes and the open proposals.

MCP: vote_issue, duplicate_issue, react_to_comment; listings show
blockers and votes. Docs, Word and PDF updated; chat notifications
(Discord, Slack, Telegram) noted for later.

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

libs/web/tracker/domain/src/lib/ports/gateways.ts

@@ -38,6 +38,9 @@ import {
   CreateReleaseInput,
   LinkIssuesInput,
   MemberInput,
+  IssueListFilter,
+  ProposalInput,
+  ProposalResult,
   MyIssuesFilter,
   UpdateIssueInput,
   UpdateProjectInput,
@@ -88,9 +91,15 @@ export abstract class IssuesGateway {
   abstract board(filter: BoardFilter): Observable<BoardColumn[]>;
   abstract issue(idOrKey: string): Observable<Issue>;
   abstract search(projectId: string, text: string): Observable<IssueSummary[]>;
+  /** A project's tickets for the list view (most recently updated first). */
+  abstract list(filter: IssueListFilter): Observable<IssuePage>;
   /** Tickets across all my projects (most recently updated first). */
   abstract mine(filter: MyIssuesFilter): Observable<IssuePage>;
   abstract create(input: CreateIssueInput): Observable<CommandResult>;
+  /** Votes for it (`on`) or takes the vote back. */
+  abstract vote(issueId: string, on: boolean): Observable<CommandResult>;
+  /** A copy of what the ticket says; the result carries its key. */
+  abstract duplicate(issueId: string): Observable<CommandResult>;
   abstract update(input: UpdateIssueInput): Observable<CommandResult>;
   abstract changeStatus(input: ChangeStatusInput): Observable<CommandResult>;
   abstract assign(
@@ -236,16 +245,33 @@ export abstract class CommentsGateway {
     replyTo?: string | null,
   ): Observable<CommandResult>;
   abstract edit(commentId: string, body: string): Observable<CommandResult>;
+  /** Adds (`on`) or takes back one's reaction. */
+  abstract react(
+    commentId: string,
+    emoji: string,
+    on: boolean,
+  ): Observable<CommandResult>;
   abstract remove(commentId: string): Observable<CommandResult>;
 }
 
 /** A ticket's files. Uploads and downloads go through the REST API. */
+/** The ticket's acknowledgement and the new file's id. */
+export type AttachmentUploaded = CommandResult & { attachmentId: string };
+
+/** The public form: no session needed. */
+export abstract class ProposalsGateway {
+  abstract submit(
+    projectKey: string,
+    proposal: ProposalInput,
+  ): Observable<ProposalResult>;
+}
+
 export abstract class AttachmentsGateway {
   abstract upload(
     issueId: string,
     file: File,
     commentId?: string | null,
-  ): Observable<CommandResult>;
+  ): Observable<AttachmentUploaded>;
   /** The file's bytes, to show (images) or save. */
   abstract download(issueId: string, attachment: Attachment): Observable<Blob>;
   abstract remove(