merge: fix: enforce uniqueness in selectedTechs and selectedSocials to preve… (#7819)

## Description

Fixes #7804

Previously, rapidly double-clicking a skill badge in the generator UI
before the React state had a chance to update could result in duplicate
entries being pushed to the selection array, causing identical badges to
render side-by-side in the final markdown output.

This PR updates `GeneratorClient.tsx` to wrap incoming arrays for both
`selectedTechs` and `selectedSocials` in a `Set`. This enforces strict
uniqueness at the top level of the state, guaranteeing that duplicate
badges can never be added to the array regardless of how quickly a user
interacts with the UI.

## Pillar

- [ ] 🎨 Pillar 1 — New Theme Design
- [ ] 📐 Pillar 2 — Geometric SVG Improvement
- [ ] 🕐 Pillar 3 — Timezone Logic Optimization
- [x] 🛠️ Other (Bug fix, refactoring, docs)

## Checklist before requesting a review:

- [x] I have read the `CONTRIBUTING.md` file.
- [x] I have tested these changes locally
(`localhost:3000/api/streak?user=YOUR_USERNAME`).
- [x] I have run `npm run format` and `npm run lint` locally and
resolved all errors (CI will fail otherwise).
- [x] My commits follow the Conventional Commits format (e.g.,
`feat(themes): ...`, `fix(calculate): ...`).
- [ ] I have updated `README.md` if I added a new theme or URL
parameter.
- [x] I have started the repo.
- [x] I have made sure that i have only one commit to merge in this PR.
- [x] The SVG output matches the CommitPulse "premium quality" aesthetic
standard (no raw elements, smooth animations, correct fonts).
- [x] (Recommended) I joined the CommitPulse Discord community for
contributor discussions, mentorship, and faster PR support.

Author: JhaSourav07

app/generator/GeneratorClient.tsx

@@ -71,9 +71,11 @@ export function GeneratorClient() {
           confirmOverwrite || !prevState.description
             ? data.description || prevState.description
             : prevState.description,
-        selectedTechs: Array.from(new Set([...prevState.selectedTechs, ...data.selectedTechs])),
+        selectedTechs: Array.from(
+          new Set([...prevState.selectedTechs, ...(data.selectedTechs || [])])
+        ),
         selectedSocials: Array.from(
-          new Set([...prevState.selectedSocials, ...data.selectedSocials])
+          new Set([...prevState.selectedSocials, ...(data.selectedSocials || [])])
         ),
         socialLinks: { ...prevState.socialLinks, ...data.socialLinks },
       };
@@ -87,8 +89,12 @@ export function GeneratorClient() {
           state={state}
           onNameChange={(v) => setState((s) => ({ ...s, name: v }))}
           onDescriptionChange={(v) => setState((s) => ({ ...s, description: v }))}
-          onTechsChange={(ids) => setState((s) => ({ ...s, selectedTechs: ids }))}
-          onSocialsChange={(ids) => setState((s) => ({ ...s, selectedSocials: ids }))}
+          onTechsChange={(ids) =>
+            setState((s) => ({ ...s, selectedTechs: Array.from(new Set(ids)) }))
+          }
+          onSocialsChange={(ids) =>
+            setState((s) => ({ ...s, selectedSocials: Array.from(new Set(ids)) }))
+          }
           onSocialLinkChange={(id, url) =>
             setState((s) => ({
               ...s,