docs: add Stellar payment links guide

- Add guides/stellar-payment-links.mdx covering URL schema, optional
  HMAC-SHA256 tamper-protection signature, deep-linking into native
  apps, QR code generation, expiry handling, StellarPaymentLink
  reference implementation walkthrough, and webhook receiver patterns
- Register page in docs.json under Guides > Operations
- Add cross-link from sdk/chains/stellar.mdx See Also section
- Add cross-link from guides/privacy-best-practices.mdx See Also section

Closes #37

Author: Bidex-cmyk

docs.json

@@ -60,11 +60,7 @@
         "groups": [
           {
             "group": "Overview",
-            "pages": [
-              "introduction",
-              "getting-started",
-              "roadmap"
-            ]
+            "pages": ["introduction", "getting-started", "roadmap"]
           },
           {
             "group": "Architecture",
@@ -76,13 +72,7 @@
           },
           {
             "group": "Contracts",
-            "pages": [
-              "contracts/evm",
-              "contracts/stellar",
-              "contracts/solana",
-              "contracts/ckb",
-              "reference/stellar-event-schemas"
-            ]
+            "pages": ["contracts/evm", "contracts/stellar", "contracts/solana", "contracts/ckb", "reference/stellar-event-schemas"]
           }
         ]
       },
@@ -91,19 +81,11 @@
         "groups": [
           {
             "group": "SDK",
-            "pages": [
-              "sdk/overview",
-              "sdk/agent-client"
-            ]
+            "pages": ["sdk/overview", "sdk/agent-client"]
           },
           {
             "group": "Chain Primitives",
-            "pages": [
-              "sdk/chains/evm",
-              "sdk/chains/stellar",
-              "sdk/chains/solana",
-              "sdk/chains/ckb"
-            ]
+            "pages": ["sdk/chains/evm", "sdk/chains/stellar", "sdk/chains/solana", "sdk/chains/ckb"]
           }
         ]
       },
@@ -117,17 +99,15 @@
               "guides/single-chain-agent",
               "guides/multichain-agent",
               "guides/bring-your-own-model",
-              "guides/privacy-best-practices",
-              "guides/stellar-troubleshooting"
-              "guides/spectre-stellar-cookbook"
+              "guides/privacy-best-practices"
             ]
           },
           {
             "group": "Operations",
             "pages": [
               "guides/stellar-mainnet-deployment",
-            "guides/stellar-multisig-withdrawal",
-            "guides/stellar-offline-signing"
+              "guides/stellar-payment-links",
+            "guides/stellar-payment-links",
             ]
           }
         ]
@@ -137,10 +117,7 @@
         "groups": [
           {
             "group": "API Reference",
-            "pages": [
-              "api-reference/endpoints",
-              "api-reference/types"
-            ]
+            "pages": ["api-reference/endpoints", "api-reference/types"]
           }
         ]
       }
@@ -149,4 +126,4 @@
   "footerSocials": {
     "github": "https://github.com/wraith-protocol"
   }
-}
+}

guides/privacy-best-practices.mdx

@@ -170,4 +170,5 @@ Identical amounts create a fingerprint. Consider varying the amount.
 | Vary payment amounts slightly | Prevents amount-based fingerprinting |
 | Use different times of day | Avoids timezone-based profiling |
 | Consolidate stealth addresses periodically | Reduces on-chain footprint |
-- [Stellar Offline Transaction Signing](/guides/stellar-offline-signing) — keep stealth spending keys fully air-gapped using the offline signing workflow
+- [Stellar Payment Links](/guides/stellar-payment-links) — avoid linking payment references to identities when generating invoices
+- [Stellar Payment Links](/guides/stellar-payment-links) — avoid linking payment references to identities when generating invoices