feat: add deep sleep batch caching, wake log, and log viewer tools

- Batch-fetch asset IDs in deep sleep mode with NVS caching to reduce
  network calls and improve battery life (configurable batch size 1-50)
- Add wake_log module: persistent CSV log of each photo cycle surviving
  reboots and deep sleep, with download/clear via web UI
- Add browser-based log viewer and log comparison tools (tools/)
- Update .gitignore to exclude .cursor/, chat-summaries/, wake_*.csv,
  and .DS_Store

Co-authored-by: Cursor <cursoragent@cursor.com>

src/immich_client.cpp

@@ -273,6 +273,69 @@ String ImmichClient::fetchOneRandomAssetId(const RandomFetchFilter& filter) {
     return "";
 }
 
+std::vector<String> ImmichClient::fetchFilteredBatch(const RandomFetchFilter& filter, int count) {
+    std::vector<String> results;
+    String url = buildUrl("/api/search/random");
+
+    JsonDocument reqDoc;
+    reqDoc["size"] = count;
+    reqDoc["type"] = "IMAGE";
+
+    if (!filter.albumIds.empty()) {
+        JsonArray arr = reqDoc["albumIds"].to<JsonArray>();
+        for (auto& id : filter.albumIds) arr.add(id);
+    }
+    if (filter.favoriteOnly) {
+        reqDoc["isFavorite"] = true;
+    }
+    if (filter.takenAfter.length() > 0) {
+        reqDoc["takenAfter"] = filter.takenAfter;
+    }
+    if (filter.takenBefore.length() > 0) {
+        reqDoc["takenBefore"] = filter.takenBefore;
+    }
+
+    String body;
+    serializeJson(reqDoc, body);
+
+    Serial.printf("[immich] fetchBatch(%d): %s\n", count, body.c_str());
+
+    String response = httpPost(url, body);
+    if (response.isEmpty()) {
+        Serial.println("[immich] fetchBatch: empty response");
+        return results;
+    }
+
+    JsonDocument doc;
+    DeserializationError err = deserializeJson(doc, response);
+    if (err) {
+        Serial.printf("[immich] fetchBatch JSON error: %s\n", err.c_str());
+        return results;
+    }
+
+    JsonArray arr = doc.as<JsonArray>();
+    for (JsonObject asset : arr) {
+        String id = asset["id"].as<String>();
+        if (id.length() == 0) continue;
+
+        // Skip RAW files
+        String filename = asset["originalFileName"] | "";
+        filename.toLowerCase();
+        if (filename.endsWith(".dng") || filename.endsWith(".raw") ||
+            filename.endsWith(".cr2") || filename.endsWith(".cr3") ||
+            filename.endsWith(".nef") || filename.endsWith(".arw") ||
+            filename.endsWith(".orf") || filename.endsWith(".rw2") ||
+            filename.endsWith(".raf") || filename.endsWith(".srw")) {
+            continue;
+        }
+
+        results.push_back(id);
+    }
+
+    Serial.printf("[immich] fetchBatch: got %d usable assets\n", (int)results.size());
+    return results;
+}
+
 AssetInfo ImmichClient::fetchAssetInfo(const String& assetId) {
     AssetInfo info;
     info.id = assetId;