Puls → Dashboard umbenennen + Projekt-Beschreibung

UI/Routing
- Tab + Route: /puls → /dashboard, Heading „Unternehmens-Puls" → „Dashboard"
- Shortcut: g p → g d (Cheatsheet entsprechend)
- Breadcrumbs, 404-Hinweistext, alle internen Links angepasst

Code-Layout
- apps/web/src/routes/puls.tsx → dashboard.tsx (Komponente DashboardRoute)
- apps/api/src/routers/puls.ts → dashboard.ts (dashboardRouter)
- tRPC-Aufrufe: trpc.puls.* / utils.puls.* → trpc.dashboard.* / utils.dashboard.*
- Auth-Redirects (/api/auth/login, /callback, dev-login) zeigen jetzt auf /dashboard

Projekt-Beschreibung
- Migration 0007_project_description: project.description text (nullable)
- Shared Zod: ProjectSchemas.createProjectInput.description (max 2000, optional)
- Backend: project.create mappt input.description
- Frontend Dialog „Neues Projekt": Textarea (3 Zeilen, optional)
- Projekt-Detail: zeigt Beschreibung als whitespace-pre-wrap unter Subtitle

README
- Routen-Tabelle, Shortcut-Liste, Verzeichnis-Baum, DB-Tabellen, Migration-Range,
  Frontend-Routenliste aktualisiert

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/web/src/components/blocker/BlockerDialog.tsx

@@ -11,7 +11,7 @@ export function BlockerDialog({ onClose }: { onClose: () => void }) {
   const mutation = trpc.blocker.create.useMutation({
     onSuccess: async () => {
       toast(voice.toast.blockerOpened);
-      await utils.puls.overview.invalidate();
+      await utils.dashboard.overview.invalidate();
       onClose();
     },
   });

apps/web/src/components/layout/AppShell.tsx

@@ -5,7 +5,7 @@ import { useCurrentUser } from '../../hooks/useCurrentUser';
 import { BlockerDialog } from '../blocker/BlockerDialog';
 
 const SHORTCUT_MAP: Record<string, string> = {
-  p: '/puls',
+  p: '/dashboard',
   h: '/heute',
   b: '/bereich',
   e: '/bereich/entwicklung',
@@ -57,7 +57,7 @@ export function AppShell() {
       if (e.key === '?' && !waitingForSecond) {
         // eslint-disable-next-line no-alert
         alert(
-          'Shortcuts:\n g p — Puls\n g b — Bereich\n g e/v/m — Entwicklung/Vertrieb/Marketing\n g h — Heute\n g a — Archiv\n n — Neuer Blocker\n ? — diese Hilfe',
+          'Shortcuts:\n g d — Dashboard\n g b — Bereich\n g e/v/m — Entwicklung/Vertrieb/Marketing\n g h — Heute\n g a — Archiv\n n — Neuer Blocker\n ? — diese Hilfe',
         );
         return;
       }

apps/web/src/components/layout/TopNav.tsx

@@ -7,7 +7,7 @@ import { voice } from '../../lib/voice';
 import { useCurrentUser } from '../../hooks/useCurrentUser';
 
 const TABS = [
-  { to: '/puls', label: 'Puls', shortcut: 'g p', matchPrefix: '/puls' },
+  { to: '/dashboard', label: 'Dashboard', shortcut: 'g d', matchPrefix: '/dashboard' },
   { to: '/bereich', label: 'Bereich', shortcut: 'g b', matchPrefix: '/bereich' },
   { to: '/heute', label: 'Heute', shortcut: 'g h', matchPrefix: '/heute' },
   { to: '/archiv', label: 'Archiv', shortcut: 'g a', matchPrefix: '/archiv' },
@@ -35,7 +35,7 @@ export function TopNav() {
         className="mx-auto flex h-14 max-w-[1280px] items-center gap-2 px-6"
         aria-label="Hauptnavigation"
       >
-        <NavLink to="/puls" className="flex items-center gap-1.5 font-bold text-[var(--color-ink)]">
+        <NavLink to="/dashboard" className="flex items-center gap-1.5 font-bold text-[var(--color-ink)]">
           <span>{voice.appName}</span>
           <ToolCtrlLogo size={18} />
         </NavLink>