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/models/models.ts

@@ -26,6 +26,8 @@ export interface Project {
   description: string | null;
   /** Anyone can read it, also without signing in. */
   isPublic: boolean;
+  /** Takes bug reports and ideas from anyone (while public). */
+  acceptsProposals: boolean;
   owner: UserRef;
   members: ProjectMember[];
   settings: ProjectSettings;
@@ -112,6 +114,11 @@ export interface IssueSummary {
   labels: string[];
   /** The epic or ticket this one breaks down. */
   parent: IssueParent | null;
+  /** Open tickets it waits for: the ones that block it or it depends on. */
+  blockedBy: IssueParent[];
+  /** How many want it done, and whether I am one of them. */
+  votes: number;
+  voted: boolean;
   /** Place in the backlog and in its board column (ascending, as text). */
   rank: string;
   /** Estimate; null when nobody estimated it. */
@@ -275,6 +282,8 @@ export interface Comment {
   replyTo: string | null;
   /** Deleted, but kept (without its text) while it has replies. */
   deleted: boolean;
+  /** 👍… and who chose each (only the ones somebody chose). */
+  reactions: { emoji: string; users: UserRef[] }[];
   createdAt: string;
   editedAt: string | null;
 }