feat: bundle Linux KneronPLUS wheel in installer

- Add scripts/linux/ directory for Linux-specific KneronPLUS wheel
- installer/app.go: add Linux case to wheel selection (scripts/linux/)
- build-installer-linux.sh: search ~/Downloads/KL520Web/package/ubuntu/
  and kneron_plus source dir for KneronPLUS*.whl
- Makefile: add Linux wheel copy to installer-payload target

Without the kp module, devices can be scanned (via pyusb fallback)
but cannot connect, load models, or run inference.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

edge-ai-platform/Makefile

@@ -141,6 +141,12 @@ installer-payload: build-server-tray ## Stage payload files for GUI installer
 		cp "$$MACOS_WHL" installer/payload/scripts/macos/; \
 		echo "  KneronPLUS macOS wheel bundled."; \
 	fi
+	@mkdir -p installer/payload/scripts/linux
+	@LINUX_WHL="$$(find ~/Downloads/KL520Web/package/ubuntu -name 'KneronPLUS*.whl' 2>/dev/null | head -1)"; \
+	if [ -n "$$LINUX_WHL" ]; then \
+		cp "$$LINUX_WHL" installer/payload/scripts/linux/; \
+		echo "  KneronPLUS Linux wheel bundled."; \
+	fi
 	@# Copy WinUSB driver files (for Windows installer)
 	@mkdir -p installer/payload/drivers/amd64
 	cp server/scripts/drivers/kneron_winusb.inf installer/payload/drivers/

edge-ai-platform/installer/app.go

@@ -457,16 +457,23 @@ func (inst *Installer) setupPythonVenv(installDir string) error {
 	}
 
 	// Install KneronPLUS SDK wheel if bundled in payload.
-	// On macOS, prefer the macOS-specific wheel (v2.0.0 with .dylib);
-	// on Windows, prefer the Windows wheel (v3.1.2 with .dll).
+	// Each platform has its own wheel with platform-specific native libraries:
+	//   macOS:   scripts/macos/KneronPLUS*.whl (v2.0.0 with .dylib)
+	//   Linux:   scripts/linux/KneronPLUS*.whl (v2.0.0/v3.1.2 with .so)
+	//   Windows: scripts/KneronPLUS*.whl (v3.1.2 with .dll)
 	scriptsDir := filepath.Join(installDir, "scripts")
 	var kpWheel string
-	if runtime.GOOS == "darwin" {
-		// macOS wheels are stored in scripts/macos/ subdirectory
+	switch runtime.GOOS {
+	case "darwin":
 		macMatches, _ := filepath.Glob(filepath.Join(scriptsDir, "macos", "KneronPLUS*.whl"))
 		if len(macMatches) > 0 {
 			kpWheel = macMatches[0]
 		}
+	case "linux":
+		linuxMatches, _ := filepath.Glob(filepath.Join(scriptsDir, "linux", "KneronPLUS*.whl"))
+		if len(linuxMatches) > 0 {
+			kpWheel = linuxMatches[0]
+		}
 	}
 	if kpWheel == "" {
 		// Fallback: pick any KneronPLUS wheel in scripts/ (Windows or generic)

edge-ai-platform/scripts/build-installer-linux.sh

@@ -111,13 +111,27 @@ cp scripts/kneron_detect.py                      installer/payload/scripts/
 cp server/scripts/firmware/KL520/*.bin           installer/payload/scripts/firmware/KL520/ 2>/dev/null || true
 cp server/scripts/firmware/KL720/*.bin           installer/payload/scripts/firmware/KL720/ 2>/dev/null || true
 
-# Copy KneronPLUS wheel if available
-kp_wheel=$(find "$REPO_ROOT" -maxdepth 2 -name 'KneronPLUS*linux*.whl' 2>/dev/null | head -1)
+# Copy KneronPLUS wheel if available (Linux-specific)
+mkdir -p installer/payload/scripts/linux
+kp_wheel=""
+# Search order: KL520Web ubuntu package → kneron_plus source zip extract → repo root
+for search_dir in \
+    "$HOME/Downloads/KL520Web/package/ubuntu" \
+    "$REPO_ROOT/kneron_plus/python/package/ubuntu" \
+    "$REPO_ROOT"; do
+    found=$(find "$search_dir" -maxdepth 1 -name 'KneronPLUS*.whl' 2>/dev/null | head -1)
+    if [ -n "$found" ]; then
+        kp_wheel="$found"
+        break
+    fi
+done
+
 if [ -n "$kp_wheel" ]; then
-    cp "$kp_wheel" installer/payload/scripts/
+    cp "$kp_wheel" installer/payload/scripts/linux/
     info "KneronPLUS wheel bundled: $(basename "$kp_wheel")"
 else
     warn "KneronPLUS wheel not found, skipping."
+    warn "  Expected in: ~/Downloads/KL520Web/package/ubuntu/"
 fi
 
 file_count=$(find installer/payload -type f | wc -l)