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xarmian
30fe60d666
* feat: add session binding, nonce-based CSP, and auth hardening Security hardening for Pad Cloud (PLAN-15 / TASK-171): - Bind sessions to User-Agent hash; mismatch invalidates session - Store client IP on session creation for audit trail - Increase bcrypt cost from 10 to 12 - Upgrade invitation codes to 128-bit entropy with hashed storage - Replace CSP unsafe-inline with per-request nonce for SvelteKit scripts - Move SecurityHeaders to main router so SPA gets headers too * fix: enforce session binding on auth cookie fallbacks and fix invitation code uniqueness - Add validateSessionCookie() helper that checks UA binding, replacing raw ValidateSession() calls in handleSessionCheck, handleGetCurrentUser, and handleUpdateCurrentUser that bypassed the new session binding - Store invitation ID in code column instead of empty string to satisfy the NOT NULL UNIQUE constraint (previously broke on second invitation) - Skip code/join_url in invitation listings for hashed invitations where the plaintext is not recoverable