docs: fix char discrepancy

Character limit discrepancy: this document specifies 1-1000 chars for story content, but line 73 in the same document and line 93 in week-5-frontend-plan.md specify a minimum of 50 chars. The minimum constraint should be consistent across all Week 5 planning documents.

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: ArchILLtect

docs/weekly-reports/week-5/week-5-plan-frontend-draft.md

@@ -6,7 +6,7 @@
 
 ## 🎯 Goal (Week 5 – Stories MVP)
 Deliver minimal UI + client code so an **authenticated** user can:
-- create a text story (1–1000 chars),
+- create a text story (50–1000 chars),
 - view a recent feed (paged),
 - view their own stories,
 - delete their own stories.