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+---
+epic: 9
+story: 9.4
+title: "Shareable URL Links"
+status: draft
+---
+
+## Epic 9 — Web App (React + WASM)
+**Goal:** Zero-install web experience with real-time collaboration.
+
+### Story 9.4: Shareable URL Links
+
+As a web user,
+I want to share my CalcPad sheet via a unique URL,
+So that others can view my calculations without needing an account.
+
+**Acceptance Criteria:**
+
+**Given** a user has an open CalcPad sheet
+**When** they click the "Share" button
+**Then** a unique URL is generated in the format `calcpad.app/s/{shortcode}`
+**And** the URL is copied to the clipboard with confirmation feedback
+
+**Given** a recipient opens a shared URL
+**When** the page loads
+**Then** the sheet is rendered in read-only mode with full formatting and answer display
+**And** the recipient cannot edit the original sheet
+
+**Given** a user is generating a share link
+**When** they enable the "Password Protection" option and set a password
+**Then** recipients are prompted to enter the password before viewing
+**And** incorrect passwords display an error and deny access
+
+**Given** a user is generating a share link
+**When** they set an expiration (e.g., 1 hour, 1 day, 7 days, 30 days)
+**Then** the link becomes inaccessible after the expiration period
+**And** visiting an expired link shows a friendly "This link has expired" message