fix: Windows identity, async address creation, mining UI, and chart artifacts

Windows identity:
- Add VERSIONINFO resource (.rc) with ObsidianDragon file description
- Embed application manifest for DPI awareness and shell identity
- Patch libwinpthread/libpthread to remove competing VERSIONINFO
- Set AppUserModelID and HWND property store to override Task Manager cache
- Link patched pthread libs to eliminate "POSIX WinThreads" description

Address creation (+New button):
- Move z_getnewaddress/getnewaddress off UI thread to async worker
- Inject new address into state immediately for instant UI selection
- Trigger background refresh for balance updates

Mining tab:
- Add pool mining dropdown with saved URLs/workers and bookmarks
- Add solo mining log panel from daemon output with chart/log toggle
- Fix toggle button cursor (render after InputTextMultiline)
- Auto-restart miner on pool config change
- Migrate default pool URL to include stratum port

Transactions:
- Sort pending (0-conf) transactions to top of history
- Fall back to timereceived when timestamp is missing

Shutdown:
- Replace blocking sleep_for calls with 100ms polling loops
- Check shutting_down_ flag throughout daemon restart/bootstrap flows
- Reduce daemon stop timeout from 30s to 10s

Other:
- Fix market chart fill artifact (single concave polygon vs per-segment quads)
- Add bootstrap checksum verification state display
- Rename daemon client identifier to ObsidianDragon

src/ui/windows/market_tab.cpp

@@ -320,15 +320,13 @@ void RenderMarketTab(App* app)
                 points[i] = ImVec2(x, y);
             }
 
-            // Fill under curve
-            for (size_t i = 0; i + 1 < n; i++) {
-                ImVec2 quad[4] = {
-                    points[i],
-                    points[i + 1],
-                    ImVec2(points[i + 1].x, plotBottom),
-                    ImVec2(points[i].x, plotBottom)
-                };
-                dl->AddConvexPolyFilled(quad, 4, fillCol);
+            // Fill under curve (single concave polygon to avoid AA seam artifacts)
+            if (n >= 2) {
+                for (size_t i = 0; i < n; i++)
+                    dl->PathLineTo(points[i]);
+                dl->PathLineTo(ImVec2(points[n - 1].x, plotBottom));
+                dl->PathLineTo(ImVec2(points[0].x, plotBottom));
+                dl->PathFillConcave(fillCol);
             }
 
             // Line