Deconstruct VncThumbnailViewer 1.4.2 and add self-contained build

The shipped VncThumbnailViewerWin1.4.2.exe is a native launcher stub with a
Java JAR appended. This commit adds:

- src/: full Java source recovered from the bundled .class files (CFR),
  plus src/summary.txt with decompiler caveats
- ANALYSIS.md: architecture, data flow, hosts-file format, and security notes
- build-app-image.ps1: reproducible jpackage build that repackages the
  original classes and bundles a slim jlinked runtime (java.base + java.desktop)
  into a self-contained native app-image (no Java required on the target)

The 74 MB app-image is shipped as a release asset rather than tracked.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/CapsContainer.java

@@ -0,0 +1,73 @@
+/*
+ * Decompiled with CFR 0.152.
+ */
+import java.util.Hashtable;
+import java.util.Vector;
+
+class CapsContainer {
+    protected Hashtable infoMap = new Hashtable(64, 0.25f);
+    protected Vector orderedList = new Vector(32, 8);
+
+    public void add(CapabilityInfo capabilityInfo) {
+        Integer n = new Integer(capabilityInfo.getCode());
+        this.infoMap.put(n, capabilityInfo);
+    }
+
+    public void add(int n, String string, String string2, String string3) {
+        Integer n2 = new Integer(n);
+        this.infoMap.put(n2, new CapabilityInfo(n, string, string2, string3));
+    }
+
+    public boolean isKnown(int n) {
+        return this.infoMap.containsKey(new Integer(n));
+    }
+
+    public CapabilityInfo getInfo(int n) {
+        return (CapabilityInfo)this.infoMap.get(new Integer(n));
+    }
+
+    public String getDescription(int n) {
+        CapabilityInfo capabilityInfo = (CapabilityInfo)this.infoMap.get(new Integer(n));
+        if (capabilityInfo == null) {
+            return null;
+        }
+        return capabilityInfo.getDescription();
+    }
+
+    public boolean enable(CapabilityInfo capabilityInfo) {
+        Integer n = new Integer(capabilityInfo.getCode());
+        CapabilityInfo capabilityInfo2 = (CapabilityInfo)this.infoMap.get(n);
+        if (capabilityInfo2 == null) {
+            return false;
+        }
+        boolean bl = capabilityInfo2.enableIfEquals(capabilityInfo);
+        if (bl) {
+            this.orderedList.addElement(n);
+        }
+        return bl;
+    }
+
+    public boolean isEnabled(int n) {
+        CapabilityInfo capabilityInfo = (CapabilityInfo)this.infoMap.get(new Integer(n));
+        if (capabilityInfo == null) {
+            return false;
+        }
+        return capabilityInfo.isEnabled();
+    }
+
+    public int numEnabled() {
+        return this.orderedList.size();
+    }
+
+    public int getByOrder(int n) {
+        int n2;
+        try {
+            n2 = (Integer)this.orderedList.elementAt(n);
+        }
+        catch (ArrayIndexOutOfBoundsException arrayIndexOutOfBoundsException) {
+            n2 = 0;
+        }
+        return n2;
+    }
+}
+