Create useSSE.ts

[onyillto]

created the useSSE hook and ensure the UI correctly reflects the connection state.

[onyillto]

closes: #577

[ogazboiz]

This hook already exists in the codebase at hooks/useSSE. Adding a second copy in components/providers/ creates duplicate code. Also the file placement doesn't match the project convention (hooks go in the hooks/ directory). I'd recommend closing this PR.

[ogazboiz]

hey, I see this closes #577 but the useSSE hook already exists in the codebase at hooks/useSSE.ts. adding a second copy in components/providers/ would create two competing versions of the same thing.

if the existing hook is missing the polling fallback from #577, the better approach would be to update the existing hook in-place rather than creating a new file. that way there's one source of truth. want to take that approach instead?

[ogazboiz]

hey, I see this closes #577 but the useSSE hook already exists in the codebase at hooks/useSSE.ts. adding a second copy in components/providers/ would create two competing versions of the same thing. if the existing hook is missing the polling fallback from #577, the better approach would be to update the existing hook in-place rather than creating a new file. that way there's one source of truth. want to take that approach instead?

[ogazboiz]

heads up, a few important changes just landed on main that affect your PR:

1. axios pinned to 1.13.5 - there's an active supply chain attack on axios 1.14.1 (pulls in confirmed malware). we added overrides in all package.json files to block it.

2. CI now runs a supply chain audit before backend/frontend jobs. if your lockfile has a compromised package, CI will fail with a clear error.

3. backend test fixes - loanEndpoints tests now use valid Stellar addresses and base64 strings. if your PR was failing backend CI but you didn't touch backend code, this should fix it after rebase.

please rebase on latest main:

git fetch upstream
git rebase upstream/main
git push --force-with-lease