fix(web): footer rebrand + disable unbuilt paid-tier cta

Two launch-day cleanups:

**Footer rebrand** — full rewrite of modules/marketing/layout/footer.tsx
from TurboStarter boilerplate (Twitter/Facebook/LinkedIn socials,
Chrome/Firefox/Edge extension links, turbostarter repo links, broken
/legal routes) to lean claudemesh structure:

- claudemesh wordmark (mesh glyph + serif) + tagline
- 2 columns: Product (Docs / Pricing / Changelog / Contact) +
  Protocol (GitHub / claude-intercom OSS / Protocol spec / Self-host
  broker)
- GitHub social icon linking to github.com/alezmad/claudemesh
- I18n controls
- Bottom bar: "© 2026 claudemesh · MIT licensed" + the existing
  BuiltWith credit pointing at claude-intercom (from cdd7931)

No trash links. No turbostarter refs. Matches landing design tokens
(--cm-*).

**Manage-plan CTA guard** — settings/billing → ManagePlan previously
always rendered an active "Visit billing portal" button that would
500 on launch day because Stripe isn't set up. For FREE-tier users
(everyone at v0.1.0) the button is now disabled + labelled
"Paid tiers coming soon". When someone is on a paid tier (future)
the real portal flow re-engages.

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

apps/web/src/modules/user/settings/billing/manage-plan.tsx

@@ -48,24 +48,39 @@ export const ManagePlan = () => {
       </SettingsCardHeader>
 
       <SettingsCardContent>
-        <Button
-          className="w-fit gap-1"
-          disabled={getPortal.isPending}
-          onClick={() =>
-            getPortal.mutate({
-              query: {
-                redirectUrl: window.location.href,
-              },
-            })
-          }
-        >
-          {t("manage.billing.visitPortal")}
-          {getPortal.isPending ? (
-            <Icons.Loader2 className="size-4 animate-spin" />
-          ) : (
-            <Icons.ArrowUpRight className="size-4" />
-          )}
-        </Button>
+        {plan.id === PricingPlanType.FREE ? (
+          // v0.1.0: only the free tier is live. Paid-tier checkout +
+          // Stripe customer portal land post-launch; surface that
+          // honestly instead of a button that would hit a 500.
+          <div className="flex items-center gap-2">
+            <Button className="w-fit gap-1" disabled>
+              {t("manage.billing.visitPortal")}
+              <Icons.ArrowUpRight className="size-4" />
+            </Button>
+            <span className="text-muted-foreground text-xs">
+              Paid tiers coming soon
+            </span>
+          </div>
+        ) : (
+          <Button
+            className="w-fit gap-1"
+            disabled={getPortal.isPending}
+            onClick={() =>
+              getPortal.mutate({
+                query: {
+                  redirectUrl: window.location.href,
+                },
+              })
+            }
+          >
+            {t("manage.billing.visitPortal")}
+            {getPortal.isPending ? (
+              <Icons.Loader2 className="size-4 animate-spin" />
+            ) : (
+              <Icons.ArrowUpRight className="size-4" />
+            )}
+          </Button>
+        )}
       </SettingsCardContent>
     </SettingsCard>
   );