fix: bw/stats 404, gateway links, history crash

- swr.ts: remove useBandwidth(), drop bw from useDashboard()
- events/route.ts: skip bandwidth SSE (Kubo 0.28.0 unsupported)
- usage/page.tsx: remove getBWStats call + bw references
- helpers.ts: gatewayLink -> ipfs.maos.dedyn.io (subdomain only)
- upload/page.tsx: fix local gatewayLink (subdomain only)
- storage.ts: update default gatewayUrl, add defensive getHistory()

graphify-out/cache/ast/93155dc8f78a78f135a0687f64636e2bc09b9dd2d7e3f8a3ecf01ddf9aaeba38.json

@@ -0,0 +1 @@
+{"nodes": [{"id": "h_ipfs_portal_deploy_sh", "label": "deploy.sh", "file_type": "code", "source_file": "deploy.sh", "source_location": "L1", "metadata": {"language": "bash", "kind": "file"}}, {"id": "h_ipfs_portal_deploy_sh__entry", "label": "deploy.sh script", "file_type": "code", "source_file": "deploy.sh", "source_location": "L1", "metadata": {"language": "bash", "kind": "bash_entrypoint"}}], "edges": [{"source": "h_ipfs_portal_deploy_sh", "target": "h_ipfs_portal_deploy_sh__entry", "relation": "contains", "confidence": "EXTRACTED", "source_file": "deploy.sh", "source_location": "L1", "weight": 1.0}]}

graphify-out/cache/stat-index.json

@@ -0,0 +1 @@
+{"H:\\IPFS-portal\\deploy.sh":{"size":3276,"mtime_ns":1782335829420010800,"hash":"93155dc8f78a78f135a0687f64636e2bc09b9dd2d7e3f8a3ecf01ddf9aaeba38"},"H:\\IPFS-portal\\package.json":{"size":741,"mtime_ns":1782331693806062100,"hash":"b4d183d0a729b9f4854201b7a3e9a097b30f87d4f5fc666c2e5bebe5f26a3713"},"H:\\IPFS-portal\\tsconfig.json":{"size":768,"mtime_ns":1782305238016408400,"hash":"07d2ec4b6bf62550169c81f9ecd578fd6f3f30c40ae57eb4ee0d57f2dd440ed1"}}