feat: refactor agent manager, media library, and player UX

- Split admin users page into player/tier-1/tier-2 tabs with affiliation labels and context-specific create dialogs

- Add media library with uploaded_files migration, list/delete unused files API, and admin nav route

- Enforce player username format (alphanumeric 3-32) on frontend and backend via shared package

- Improve admin dialog/panel styling; refine player parlay and match bet card kickoff display

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/player/src/main.ts

@@ -149,6 +149,7 @@ const i18n = createI18n({
         tab_parlay: '串关投注',
         tab_today: '今日',
         tab_early: '早盘',
+        today: '今日',
         loading: '加载中…',
         no_matches: '暂无赛事',
         outright_coming: '优胜冠军玩法即将上线',
@@ -207,6 +208,10 @@ const i18n = createI18n({
         market_ht_handicap: '半场 让球',
         market_ht_ou: '半场 大小',
         market_ht_1x2: '半场 独赢盘',
+        parlay_lbl_handicap: '让球',
+        parlay_lbl_ou: '大小',
+        parlay_lbl_1x2: '独赢盘',
+        parlay_lbl_oe: '单/双',
         parlay_sel_home: '主',
         parlay_sel_away: '客',
         parlay_sel_draw: '和',
@@ -450,6 +455,7 @@ const i18n = createI18n({
         tab_parlay: 'Parlay',
         tab_today: 'Today',
         tab_early: 'Early',
+        today: 'Today',
         loading: 'Loading…',
         no_matches: 'No matches',
         outright_coming: 'Outright markets coming soon',
@@ -508,6 +514,10 @@ const i18n = createI18n({
         market_ht_handicap: 'HT Handicap',
         market_ht_ou: 'HT O/U',
         market_ht_1x2: 'HT 1X2',
+        parlay_lbl_handicap: 'Handicap',
+        parlay_lbl_ou: 'O/U',
+        parlay_lbl_1x2: '1X2',
+        parlay_lbl_oe: 'Odd/Even',
         parlay_sel_home: 'H',
         parlay_sel_away: 'A',
         parlay_sel_draw: 'D',
@@ -757,6 +767,7 @@ const i18n = createI18n({
         tab_parlay: 'Berganda',
         tab_today: 'Hari Ini',
         tab_early: 'Awal',
+        today: 'Hari Ini',
         loading: 'Memuatkan…',
         no_matches: 'Tiada perlawanan',
         outright_coming: 'Pasaran juara akan datang',
@@ -815,6 +826,10 @@ const i18n = createI18n({
         market_ht_handicap: 'Handicap Separuh',
         market_ht_ou: 'Atas/Bawah Separuh',
         market_ht_1x2: '1X2 Separuh',
+        parlay_lbl_handicap: 'Handicap',
+        parlay_lbl_ou: 'Atas/Bawah',
+        parlay_lbl_1x2: '1X2',
+        parlay_lbl_oe: 'Ganjil/Genap',
         parlay_sel_home: 'R',
         parlay_sel_away: 'P',
         parlay_sel_draw: 'S',