docs: add issue and PR description for publication questions feature

Author: kushvinth

issue.md

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+# Publications group of questions on Search page
+
+## Feature Request
+
+> Ref: Issue #26
+
+Add publication-related question prompts to the bottom of the **Biomodel Database Search** page (`/search`). These questions should appear after a horizontal line separator and link users to the AI chat to explore VCell publication data.
+
+## Requested Questions
+
+1. **"Are there VCell biomodels featured in Nature journal?"**
+2. **"List all publications that feature VCell models of calcium."**
+
+## Acceptance Criteria
+
+- [ ] A new section titled "Publication Questions" appears at the bottom of the `/search` page
+- [ ] The section is separated from the search results by a horizontal line
+- [ ] Each question is displayed as a clickable button that navigates to `/chat`
+- [ ] The section is visible on both desktop and mobile viewports
+
+## Labels
+
+`Feature`, `frontend`

pr.md

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+# feat: add publication questions section to search page
+
+Closes #26
+
+## Description
+
+Adds a **"Publication Questions"** section to the bottom of the Biomodel Database Search page (`/search`), as requested in issue #26. The section appears below a horizontal line separator and provides two clickable question prompts that link to the AI chat page.
+
+## Changes
+
+**File:** `frontend/app/search/page.tsx`
+
+- Added `BookOpen` icon import from `lucide-react`
+- Added a new "Publication Questions" section at the bottom of the page with:
+  - A horizontal line separator (`border-t`)
+  - Section heading with a book icon
+  - Descriptive subtitle
+  - Two question buttons linking to `/chat`:
+    1. _"Are there VCell biomodels featured in Nature journal?"_
+    2. _"List all publications that feature VCell models of calcium."_
+- Buttons are responsive: side-by-side on desktop, stacked on mobile (`flex-col sm:flex-row`)
+
+## Screenshots
+
+### Search page with Publication Questions section
+The new section appears below the search filters card, separated by a horizontal line. Both questions are displayed as outlined buttons with search icons.
+
+## Testing
+
+- Verified the section renders correctly on desktop (1440×900)
+- Both buttons are visible and clickable
+- Links navigate to `/chat` as expected
+- Layout stacks vertically on mobile viewports
+- No visual regression to existing search functionality