✨ feat(gifts): add gift code creation script and initial codes

- Add create-gift-codes.mjs script for batch gift code generation
- Create 10 gift codes with 1000 Mana each for distribution

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

gift-codes-2026-02-14.txt

@@ -0,0 +1,78 @@
+Mana Gift Codes - Created 2026-02-14
+10 codes with 1000 Mana each
+============================================================
+
+Diese Codes sind LIVE auf Production (auth.mana.how)
+Gueltig bis: 2026-05-15
+
+============================================================
+GIFT CODES
+============================================================
+
+1.  Code: MANA01
+    URL:  https://mana.how/g/MANA01
+    Mana: 1000
+
+2.  Code: MANA02
+    URL:  https://mana.how/g/MANA02
+    Mana: 1000
+
+3.  Code: MANA03
+    URL:  https://mana.how/g/MANA03
+    Mana: 1000
+
+4.  Code: MANA04
+    URL:  https://mana.how/g/MANA04
+    Mana: 1000
+
+5.  Code: MANA05
+    URL:  https://mana.how/g/MANA05
+    Mana: 1000
+
+6.  Code: MANA06
+    URL:  https://mana.how/g/MANA06
+    Mana: 1000
+
+7.  Code: MANA07
+    URL:  https://mana.how/g/MANA07
+    Mana: 1000
+
+8.  Code: MANA08
+    URL:  https://mana.how/g/MANA08
+    Mana: 1000
+
+9.  Code: MANA09
+    URL:  https://mana.how/g/MANA09
+    Mana: 1000
+
+10. Code: MANA10
+    URL:  https://mana.how/g/MANA10
+    Mana: 1000
+
+============================================================
+Zum Teilen (URLs):
+
+https://mana.how/g/MANA01
+https://mana.how/g/MANA02
+https://mana.how/g/MANA03
+https://mana.how/g/MANA04
+https://mana.how/g/MANA05
+https://mana.how/g/MANA06
+https://mana.how/g/MANA07
+https://mana.how/g/MANA08
+https://mana.how/g/MANA09
+https://mana.how/g/MANA10
+
+============================================================
+Nur die Codes:
+
+MANA01
+MANA02
+MANA03
+MANA04
+MANA05
+MANA06
+MANA07
+MANA08
+MANA09
+MANA10