fix: download the per-chip LittleFS image in online updates

Releases publish SomfyController.littlefs.<chip>.bin, but the updater asked
for SomfyController.littlefs.bin. The download 404'd and the device rebooted
into the new firmware with the old web UI.

Also: hasFS now matches per-chip images, C6 picks its own firmware file, and
recoverFilesystem() points at cjkas instead of rstrouse.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/GitOTA.cpp

@@ -43,7 +43,7 @@ void GitRelease::setReleaseProperty(const char *key, const char *val) {
 void GitRelease::setAssetProperty(const char *key, const char *val) {
   if(strcmp(key, "name") == 0) {
     //Serial.println(val);
-    if(strstr(val, "littlefs.bin")) this->hasFS = true;
+    if(isFsAsset(val)) this->hasFS = true;
     else if(strstr(val, "ino.esp32.bin")) {
       if(strlen(this->hwVersions)) strcat(this->hwVersions, ",");
       strcat(this->hwVersions, "32");
@@ -353,22 +353,16 @@ void GitUpdater::emitDownloadProgress(uint8_t num, size_t total, size_t loaded,
   sockEmit.loop();
   webServer.loop();
 }
-void GitUpdater::setFirmwareFile() {
+// The chip part of this board's release asset names.
+static const char *chipName() {
     esp_chip_info_t ci;
     esp_chip_info(&ci);
     switch(ci.model) {
-      case esp_chip_model_t::CHIP_ESP32S3:
-        strcpy(this->currentFile, "SomfyController.ino.esp32s3.bin");
-        break;
-      case esp_chip_model_t::CHIP_ESP32S2:
-        strcpy(this->currentFile, "SomfyController.ino.esp32s2.bin");
-        break;
-      case esp_chip_model_t::CHIP_ESP32C3:
-        strcpy(this->currentFile, "SomfyController.ino.esp32c3.bin");
-        break;
-      default:
-        strcpy(this->currentFile, "SomfyController.ino.esp32.bin");
-        break;
+      case esp_chip_model_t::CHIP_ESP32S3: return "esp32s3";
+      case esp_chip_model_t::CHIP_ESP32S2: return "esp32s2";
+      case esp_chip_model_t::CHIP_ESP32C3: return "esp32c3";
+      case esp_chip_model_t::CHIP_ESP32C6: return "esp32c6";
+      default: return "esp32";
     }
 }
 
@@ -379,14 +373,14 @@ bool GitUpdater::beginUpdate(const char *version) {
   
   strcpy(this->targetRelease, version);
   this->emitUpdateCheck();
-  this->setFirmwareFile();
+  releaseAssetName(this->currentFile, sizeof(this->currentFile), "ino", chipName());
   this->partition = U_FLASH;
   this->lockFS = this->cancelled = false;
   this->error = 0;
   this->error = this->downloadFile();
   if(this->error == 0 && !this->cancelled) {
     somfy.commit();
-    strcpy(this->currentFile, "SomfyController.littlefs.bin");
+    releaseAssetName(this->currentFile, sizeof(this->currentFile), "littlefs", chipName());
     this->partition = U_SPIFFS;
     this->lockFS = true;
     this->error = this->downloadFile();
@@ -405,8 +399,8 @@ bool GitUpdater::beginUpdate(const char *version) {
   return true;
 }
 bool GitUpdater::recoverFilesystem() {
-  sprintf(this->baseUrl, "https://github.com/rstrouse/ESPSomfy-RTS/releases/download/%s/", settings.fwVersion.name);
-  strcpy(this->currentFile, "SomfyController.littlefs.bin");
+  sprintf(this->baseUrl, "https://github.com/cjkas/ESPSomfy-RTS/releases/download/%s/", settings.fwVersion.name);
+  releaseAssetName(this->currentFile, sizeof(this->currentFile), "littlefs", chipName());
   this->status = GIT_UPDATING;
   this->partition = U_SPIFFS;
   this->lockFS = true;

src/GitOTA.h

@@ -55,7 +55,6 @@ class GitUpdater {
     bool beginUpdate(const char *release);
     bool endUpdate();
     int8_t downloadFile();
-    void setFirmwareFile();
     void setCurrentRelease(GitRepo &repo);
     void loop();
 

src/Utils.cpp

@@ -150,6 +150,14 @@ bool worthRoaming(bool connected, int currentRssi, int apRssi, int minGain) {
 bool otaProven(bool networkUp, unsigned long uptimeMs, unsigned long minUptimeMs) {
   return networkUp && uptimeMs >= minUptimeMs;
 }
+bool releaseAssetName(char *buf, size_t size, const char *kind, const char *chip) {
+  int n = snprintf(buf, size, "SomfyController.%s.%s.bin", kind, chip);
+  return n >= 0 && (size_t)n < size;
+}
+bool isFsAsset(const char *name) {
+  size_t len = strlen(name);
+  return strstr(name, ".littlefs.") && len >= 4 && strcmp(name + len - 4, ".bin") == 0;
+}
 const char *wifiAuthModeName(uint8_t authMode) {
   switch(authMode) {
     case 0: return "OPEN";

src/Utils.h

@@ -86,6 +86,12 @@ heap_emit_t heapEmitTarget(uint8_t num, uint32_t sinceLastMs, uint32_t intervalM
 // update has proven itself: it has run for minUptimeMs and the network is
 // up.  Until then a reset rolls back to the previous firmware.
 bool otaProven(bool networkUp, unsigned long uptimeMs, unsigned long minUptimeMs);
+// A release asset's name: "SomfyController.<kind>.<chip>.bin", kind "ino" for
+// the firmware or "littlefs" for the web UI image, chip e.g. "esp32s3".  False
+// when it doesn't fit in size.
+bool releaseAssetName(char *buf, size_t size, const char *kind, const char *chip);
+// Whether a release asset is a LittleFS image, for any chip.
+bool isFsAsset(const char *name);
 // How well loop() keeps up: the passes it made per second and its longest
 // pass, over the window since the last memStatus broadcast.  Only the loop
 // task calls record(), rate(), maxUs() and publish().  publish() closes the