fix: add generateUUID fallback for crypto.randomUUID in PackGeneratorService and document the solution.

docs/development/devlog/2025-12-14-214400_fix_uuid_error.md

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+# Fix UUID Error in Insecure Contexts
+
+## Problem
+The user reported a `TypeError: crypto.randomUUID is not a function` when accessing the application from a public IP. This is because `crypto.randomUUID()` is part of the Web Crypto API, which is often restricted to secure contexts (HTTPS) or localhost. When accessing via `http://PUBLIC_IP:PORT`, the browser disables this API.
+
+## Solution
+We need to implement a fallback UUID generation method that works in non-secure contexts.
+
+## Plan
+1.  Modify `src/client/src/services/PackGeneratorService.ts`.
+2.  Add a private method `generateUUID()` to the `PackGeneratorService` class (or a standalone helper function in the module) that:
+    *   Checks if `crypto.randomUUID` is available.
+    *   If yes, uses it.
+    *   If no, uses a fallback algorithm (e.g., `Math.random()` based v4 UUID generation).
+3.  Replace the call `crypto.randomUUID()` with this new method.