hub: unified customer page, blocked status, dashboard merge

- Replace separate config detail and report detail pages with unified
  /customers/{id} page showing both config info and live report data
- Add "blocked" status for customers (hidden from dashboard, notifications
  suppressed, still accepts reports)
- Dashboard now shows config-only customers as "PENDING" status
- Customers list: all rows link to /customers/{id}, show BLOCKED badge
- New actions: block/unblock, push config to controller, auto-create
  config from report data
- /configs/{id} now redirects to /customers/{id}
- Add config-badge CSS classes for MANAGED/MANUAL/BLOCKED badges

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

hub/internal/web/templates/config_form.html

@@ -16,7 +16,7 @@
             </nav>
         </header>
 
-        <a href="{{if .IsNew}}/configs{{else}}/configs/{{.Config.CustomerID}}{{end}}" class="back-link">&larr; Back</a>
+        <a href="{{if .IsNew}}/configs{{else}}/customers/{{.Config.CustomerID}}{{end}}" class="back-link">&larr; Back</a>
         <h2>{{if .IsNew}}Add Customer{{else}}Edit: {{.Config.CustomerID}}{{end}}</h2>
 
         {{if .Error}}
@@ -136,7 +136,7 @@
 
             <div style="margin-top: 1.5rem; display: flex; gap: 1rem;">
                 <button type="submit" class="btn">{{if .IsNew}}Create Configuration{{else}}Save Changes{{end}}</button>
-                <a href="{{if .IsNew}}/configs{{else}}/configs/{{.Config.CustomerID}}{{end}}" class="btn btn-outline">Cancel</a>
+                <a href="{{if .IsNew}}/configs{{else}}/customers/{{.Config.CustomerID}}{{end}}" class="btn btn-outline">Cancel</a>
             </div>
         </form>