Revert "chore: reduce coach prompt trigger threshold from 10 to 5 messages"

chore: reduce coach prompt trigger threshold from 10 to 5 messages

feat: add early username availability check on registration step 1

feat: add "無任職" position option to registration form

feat: implement two-step registration form with teacher profile fields

fix: add fallback password for server-side auth validation

change the wording "SEL Chat Coach" to "師生對話練習室"

validate username when registration

support additional teacher registration information

feat: add help icon buttons with info modals on dashboard

feat: defer coach selection to ad prompt with two-step UI

add retry logic and health check for database clients

revise evaluation to be generic

support reset evaluation prompt

revise evaluation prompt

support updating evaluation prompt in UI

refine evaluation and fix CSV download problem

support evaluating coach direct prompt

support conversation evaluation

support admin login page

support admin login page

feat: remove the usage of coach summary

refactor: extract coach modal animation into reusable components

feat: improve coach modal open/close animation symmetry

feat: modify coach modal style and animation

feat: Move ask coach button from header to message input area

Change the coach conversation trigger from 15 messages to 10 messages

fix: resolve 404 error when branching from new messages

Merge branch 'fix-retry-fail-remove-autocomplete'

fix: turn of autoComplete and fix rtey failed

Change the coach conversation trigger from 6 messages to 15 messages

fix: build failed

feat: add branch converstion feature

add error handling to prevent stuck

make conversation query more friendly

prevent conversation N+1 query

prevent conversation N+1 query

prevent conversation N+1 query

tune performance

fix: Prevent Supabase connection pool exhaustion in health endpoint

fix: Correct sessions table column mapping in health endpoint

fix: Improve Supabase connection handling and fix health endpoint schema errors

security: Remove production credentials from repository

fix: Fix PostgreSQL compatibility issues in GROUP BY queries

feat: Add production deployment support with Supabase and Docker

Add supabase support (#3)

fix: Fix speaker auto-detection race condition on conversation reload

update student prompt: 小許、阿杰

Update coach prompt to 20251030v3

fix incorrect field problem