fix: repair SSO auto-login and remove repo artifacts

- Add missing fetchT dep to session-handlers.js (fixes ctx is not
  defined error that broke jellyfin/emby/plex/syncthing SSO)
- Replace all ctx.fetchT calls with direct fetchT usage
- Remove server-old.js (69K monolith backup) from tracking
- Remove AI-generated doc artifacts from repo root
- Update .gitignore to prevent re-adding these files

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

dashcaddy-api/routes/auth/session-handlers.js

@@ -1,7 +1,7 @@
 const { SESSION_TTL, APP, PLEX, TIMEOUTS, buildMediaAuth } = require('../../constants');
 const { createCache, CACHE_CONFIGS } = require('../../cache-config');
 
-module.exports = function({ authManager, credentialManager, asyncHandler, errorResponse, log }) {
+module.exports = function({ authManager, credentialManager, fetchT, asyncHandler, errorResponse, log }) {
   // App session cache for auto-login
 /**
  * Auth session handlers routes factory
@@ -71,7 +71,7 @@ module.exports = function({ authManager, credentialManager, asyncHandler, errorR
       case 'emby': {
         const mediaAuth = buildMediaAuth(APP.DEVICE_IDS.SSO);
         try {
-          const authResp = await ctx.fetchT(`${baseUrl}/Users/AuthenticateByName`, {
+          const authResp = await fetchT(`${baseUrl}/Users/AuthenticateByName`, {
             method: 'POST',
             headers: { 'Content-Type': 'application/json', 'X-Emby-Authorization': mediaAuth },
             body: JSON.stringify({ Username: username, Pw: password }),
@@ -95,7 +95,7 @@ module.exports = function({ authManager, credentialManager, asyncHandler, errorR
       }
       case 'plex': {
         try {
-          const plexResp = await ctx.fetchT(PLEX.AUTH_URL, {
+          const plexResp = await fetchT(PLEX.AUTH_URL, {
             method: 'POST',
             headers: {
               'Accept': 'application/json', 'Content-Type': 'application/json',
@@ -127,7 +127,7 @@ module.exports = function({ authManager, credentialManager, asyncHandler, errorR
     }
 
     try {
-      const resp = await ctx.fetchT(loginUrl, {
+      const resp = await fetchT(loginUrl, {
         method: 'POST',
         headers: { 'Content-Type': contentType, ...extraHeaders },
         body: loginBody, redirect: 'manual',