Add p2pool-style labels to dashboard payouts (auto/donation/explicit)

Server-side: add "source" field to /current_merged_payouts entries
with values "auto-convert", "donation", or "explicit" matching
p2pool's label system.

Client-side: render labels with p2pool styling:
  - "⚠ auto" (gold) for auto-converted addresses with tooltip
  - "donation" (gray) for pool donation outputs
  - "✓ explicit" (green) for explicit merged addresses
  - "pool dev fee" label on LTC donation entry

Author: frstrtr

src/core/web_server.cpp

@@ -4218,11 +4218,25 @@ nlohmann::json MiningInterface::rest_current_merged_payouts()
             // TODO: testnet detection for DOGE address versions
 
             for (auto& [script, amount] : merged_payouts) {
+                // Determine source label (p2pool: auto-convert, donation, explicit)
+                std::string source = "auto-convert"; // default for V35 (no explicit merged addrs)
+                // Donation: P2PK (ends with OP_CHECKSIG), P2SH matching donation script,
+                // or script matching the known donation_script from MiningInterface
+                bool is_donation = (script.size() > 33 && script.back() == 0xac); // P2PK
+                if (!is_donation && !m_donation_script.empty() && script == m_donation_script)
+                    is_donation = true; // matches configured donation script
+                if (!is_donation && script.size() == 23 && script[0] == 0xa9) {
+                    // Check if P2SH matches combined donation hash (8c6272621d89e8fa...)
+                    if (script[2] == 0x8c && script[3] == 0x62 && script[4] == 0x72)
+                        is_donation = true;
+                }
+                if (is_donation) source = "donation";
+                // TODO: detect "explicit" when V36 shares carry merged_addresses
+
                 // Convert merged script to proper DOGE address
                 std::string merged_addr = script_to_address(script, "", merged_p2pkh_ver, merged_p2sh_ver);
                 if (merged_addr.empty()) {
-                    // P2PK (donation script) — hash the pubkey to get address
-                    if (script.size() > 33 && script.back() == 0xac) {
+                    if (source == "donation") {
                         merged_addr = "donation";
                     }
                 }
@@ -4257,7 +4271,8 @@ nlohmann::json MiningInterface::rest_current_merged_payouts()
                                 entry["merged"].push_back({
                                     {"symbol", ci.symbol},
                                     {"address", merged_addr.empty() ? hash160_hex : merged_addr},
-                                    {"amount", amount / 1e8}
+                                    {"amount", amount / 1e8},
+                                    {"source", source}
                                 });
                                 attached = true;
                                 break;
@@ -4272,7 +4287,8 @@ nlohmann::json MiningInterface::rest_current_merged_payouts()
                     result[key]["merged"].push_back({
                         {"symbol", ci.symbol},
                         {"address", key},
-                        {"amount", amount / 1e8}
+                        {"amount", amount / 1e8},
+                        {"source", source}
                     });
                 }
             }

web-static/dashboard.html

@@ -3392,12 +3392,20 @@ <h2>🔍 Share Explorer</h2>
 
                 // Main row for parent chain
                 var mainRow = tbody.append('tr');
-                mainRow.append('td').append('a')
+                var addrTd = mainRow.append('td');
+                addrTd.append('a')
                     .attr('class', 'hash-link')
                     .attr('href', currency_info.address_explorer_url_prefix + addr)
                     .attr('target', '_blank')
                     .attr('title', addr)
                     .text(addr);
+                if (addr === 'donation') {
+                    addrTd.append('span')
+                        .style('color', '#888')
+                        .style('font-size', '0.6rem')
+                        .style('margin-left', '4px')
+                        .text('pool dev fee');
+                }
                 mainRow.append('td')
                     .style('text-align', 'right')
                     .attr('class', 'amount')
@@ -3424,6 +3432,28 @@ <h2>🔍 Share Explorer</h2>
                             .attr('target', '_blank')
                             .attr('title', merged.address)
                             .text(merged.address);
+                        // p2pool-style source labels
+                        if (merged.source === 'auto-convert') {
+                            addrCell.append('span')
+                                .style('color', '#b08800')
+                                .style('font-size', '0.6rem')
+                                .style('margin-left', '4px')
+                                .attr('title', 'Auto-converted from parent chain address (same pubkey hash). During V35\u2192V36 transition, all merged addresses are auto-converted since V35 shares cannot carry explicit merged addresses.')
+                                .text('\u26A0 auto');
+                        } else if (merged.source === 'donation') {
+                            addrCell.append('span')
+                                .style('color', '#888')
+                                .style('font-size', '0.6rem')
+                                .style('margin-left', '4px')
+                                .text('donation');
+                        } else if (merged.source === 'explicit') {
+                            addrCell.append('span')
+                                .style('color', '#28a745')
+                                .style('font-size', '0.6rem')
+                                .style('margin-left', '4px')
+                                .attr('title', 'Explicit merged chain address provided by miner via stratum username')
+                                .text('\u2713 explicit');
+                        }
 
                         subRow.append('td')
                             .style('text-align', 'right')