feat(web): create-mesh form + invite-link generator with QR code

- create-mesh-form: RHF + zod + shadcn Form. Fields name, slug (auto-
  derived from name, editable), visibility, transport. Slug validation
  matches server (lowercase letters, digits, hyphens). Slug collision
  errors surface on the slug field.
- invite-generator: RHF + zod. Fields role, maxUses, expiresInDays.
  After generation: renders the ic://join/... invite link as a 256px
  QR code (PNG data URL, Claude-palette colors) + copy-to-clipboard
  button + "claudemesh join <link>" snippet for teammates.

Add: qrcode 1.5.4 + @types/qrcode 1.5.5 (QR generation runs client-side).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/web/src/modules/mesh/create-mesh-form.tsx

@@ -0,0 +1,177 @@
+"use client";
+
+import { useRouter } from "next/navigation";
+import { useEffect } from "react";
+import { useForm } from "react-hook-form";
+import { zodResolver } from "@hookform/resolvers/zod";
+
+import {
+  createMyMeshInputSchema,
+  type CreateMyMeshInput,
+} from "@turbostarter/api/schema";
+import { handle } from "@turbostarter/api/utils";
+import { Button } from "@turbostarter/ui-web/button";
+import {
+  Form,
+  FormControl,
+  FormDescription,
+  FormField,
+  FormItem,
+  FormLabel,
+  FormMessage,
+} from "@turbostarter/ui-web/form";
+import { Input } from "@turbostarter/ui-web/input";
+import {
+  Select,
+  SelectContent,
+  SelectItem,
+  SelectTrigger,
+  SelectValue,
+} from "@turbostarter/ui-web/select";
+
+import { pathsConfig } from "~/config/paths";
+import { api } from "~/lib/api/client";
+
+const slugify = (s: string) =>
+  s
+    .toLowerCase()
+    .trim()
+    .replace(/[^a-z0-9]+/g, "-")
+    .replace(/^-+|-+$/g, "")
+    .slice(0, 40);
+
+export const CreateMeshForm = () => {
+  const router = useRouter();
+  const form = useForm<CreateMyMeshInput>({
+    resolver: zodResolver(createMyMeshInputSchema),
+    defaultValues: {
+      name: "",
+      slug: "",
+      visibility: "private",
+      transport: "managed",
+    },
+  });
+
+  const nameValue = form.watch("name");
+  const slugDirty = form.formState.dirtyFields.slug;
+
+  useEffect(() => {
+    if (!slugDirty && nameValue) {
+      form.setValue("slug", slugify(nameValue));
+    }
+  }, [nameValue, slugDirty, form]);
+
+  const onSubmit = async (values: CreateMyMeshInput) => {
+    try {
+      const res = (await handle(api.my.meshes.$post)({
+        json: values,
+      })) as { id: string; slug: string } | { error: string };
+      if ("error" in res) {
+        form.setError("slug", { message: res.error });
+        return;
+      }
+      router.push(pathsConfig.dashboard.user.meshes.mesh(res.id));
+    } catch (e) {
+      form.setError("root", {
+        message: e instanceof Error ? e.message : "Failed to create mesh.",
+      });
+    }
+  };
+
+  return (
+    <Form {...form}>
+      <form onSubmit={form.handleSubmit(onSubmit)} className="space-y-6">
+        <FormField
+          control={form.control}
+          name="name"
+          render={({ field }) => (
+            <FormItem>
+              <FormLabel>Name</FormLabel>
+              <FormControl>
+                <Input placeholder="Platform team" {...field} />
+              </FormControl>
+              <FormDescription>
+                Display name — what teammates see.
+              </FormDescription>
+              <FormMessage />
+            </FormItem>
+          )}
+        />
+        <FormField
+          control={form.control}
+          name="slug"
+          render={({ field }) => (
+            <FormItem>
+              <FormLabel>Slug</FormLabel>
+              <FormControl>
+                <Input placeholder="platform-team" {...field} />
+              </FormControl>
+              <FormDescription>
+                URL-safe identifier: lowercase letters, digits, hyphens.
+              </FormDescription>
+              <FormMessage />
+            </FormItem>
+          )}
+        />
+        <FormField
+          control={form.control}
+          name="visibility"
+          render={({ field }) => (
+            <FormItem>
+              <FormLabel>Visibility</FormLabel>
+              <Select onValueChange={field.onChange} defaultValue={field.value}>
+                <FormControl>
+                  <SelectTrigger>
+                    <SelectValue />
+                  </SelectTrigger>
+                </FormControl>
+                <SelectContent>
+                  <SelectItem value="private">
+                    Private — invite-only
+                  </SelectItem>
+                  <SelectItem value="public">
+                    Public — anyone with the link
+                  </SelectItem>
+                </SelectContent>
+              </Select>
+              <FormMessage />
+            </FormItem>
+          )}
+        />
+        <FormField
+          control={form.control}
+          name="transport"
+          render={({ field }) => (
+            <FormItem>
+              <FormLabel>Transport</FormLabel>
+              <Select onValueChange={field.onChange} defaultValue={field.value}>
+                <FormControl>
+                  <SelectTrigger>
+                    <SelectValue />
+                  </SelectTrigger>
+                </FormControl>
+                <SelectContent>
+                  <SelectItem value="managed">Managed (claudemesh.com)</SelectItem>
+                  <SelectItem value="tailscale">Tailscale</SelectItem>
+                  <SelectItem value="self_hosted">Self-hosted broker</SelectItem>
+                </SelectContent>
+              </Select>
+              <FormDescription>
+                How peers reach the broker.
+              </FormDescription>
+              <FormMessage />
+            </FormItem>
+          )}
+        />
+        {form.formState.errors.root && (
+          <p className="text-destructive text-sm">
+            {form.formState.errors.root.message}
+          </p>
+        )}
+        <Button type="submit" disabled={form.formState.isSubmitting}>
+          {form.formState.isSubmitting ? "Creating…" : "Create mesh"}
+        </Button>
+      </form>
+    </Form>
+  );
+};