feat: steadier live updates and notices for public proposals

- The web pings the live connection, reconnects when it goes quiet and
  reloads what each screen shows after reconnecting.
- Dropping a card on a column it cannot go to puts it back.
- Owners and admins get a notice when a proposal arrives.
- The proposal limit lives in Redis, so it holds across instances.
- REST tells whether I voted; pasted images leave the attachment list.
- Deleting a project removes its Git integration; no lint warnings left.
- Reactions and the blocked badge are components of their own.
- Docs: what is done and what is left (chapter 10), Word and PDF.

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

libs/api/tracker/presenters/src/lib/http/issues.controller.ts

@@ -135,7 +135,10 @@ export class IssuesController {
       limit: query.limit,
       offset: query.offset,
     });
-    return { ...page, items: await this.refs.issueDtos(page.items) };
+    return {
+      ...page,
+      items: await this.refs.issueDtos(page.items, viewerOf(me)),
+    };
   }
 
   @Get('projects/:project/issues')
@@ -173,7 +176,10 @@ export class IssuesController {
       limit: query.limit,
       offset: query.offset,
     });
-    return { ...page, items: await this.refs.issueDtos(page.items) };
+    return {
+      ...page,
+      items: await this.refs.issueDtos(page.items, viewerOf(me)),
+    };
   }
 
   @Post('projects/:project/issues')
@@ -219,7 +225,7 @@ export class IssuesController {
     return Promise.all(
       epics.map(async (epic) => ({
         ...epic,
-        issue: await this.refs.issueDto(epic.issue),
+        issue: await this.refs.issueDto(epic.issue, viewerOf(me)),
       })),
     );
   }
@@ -234,7 +240,10 @@ export class IssuesController {
     @CurrentUser() me: User | undefined,
     @Param('issue') issue: string,
   ) {
-    return this.refs.issueDto(await this.issues.findOne(viewerOf(me), issue));
+    return this.refs.issueDto(
+      await this.issues.findOne(viewerOf(me), issue),
+      viewerOf(me),
+    );
   }
 
   @Patch('issues/:issue')
@@ -392,6 +401,7 @@ export class IssuesController {
         viewerOf(me),
         await this.refs.projectId(viewerOf(me), project),
       ),
+      viewerOf(me),
     );
   }