Add tool configuration management and enhance UI functionality

Introduce `ToolConfigStore` for managing tool configuration files, enabling retrieval and updates. Refactor window handling to support Lua timeout settings and dynamic tool-specific configurations. Improve HTML UI with Lua timeout adjustments and centralized styling updates.

src/toolConfig.cpp

@@ -0,0 +1,100 @@
+#include "toolConfig.h"
+
+#include <fstream>
+#include <sstream>
+#include <vector>
+
+bool ToolConfigStore::ensureExists(const std::filesystem::path &path) const {
+    if (path.empty()) {
+        return false;
+    }
+    if (std::filesystem::exists(path)) {
+        return true;
+    }
+    std::ofstream out(path);
+    if (!out) {
+        return false;
+    }
+    out << "lua_timeout_seconds=30\n";
+    return true;
+}
+
+static bool parse_key_value(const std::string &line, std::string &key, std::string &value) {
+    const auto pos = line.find('=');
+    if (pos == std::string::npos) {
+        return false;
+    }
+    key = line.substr(0, pos);
+    value = line.substr(pos + 1);
+    return true;
+}
+
+int ToolConfigStore::getInt(const std::filesystem::path &path, const std::string &key, int fallback) const {
+    if (!std::filesystem::exists(path)) {
+        return fallback;
+    }
+    std::ifstream in(path);
+    std::string line;
+    while (std::getline(in, line)) {
+        std::string k, v;
+        if (!parse_key_value(line, k, v)) {
+            continue;
+        }
+        if (k == key) {
+            try {
+                return std::max(0, std::stoi(v));
+            } catch (...) {
+                return fallback;
+            }
+        }
+    }
+    return fallback;
+}
+
+void ToolConfigStore::setInt(const std::filesystem::path &path, const std::string &key, int value) const {
+    std::vector<std::string> lines;
+    if (std::filesystem::exists(path)) {
+        std::ifstream in(path);
+        std::string line;
+        while (std::getline(in, line)) {
+            lines.push_back(line);
+        }
+    }
+
+    bool updated = false;
+    for (auto &line : lines) {
+        std::string k, v;
+        if (parse_key_value(line, k, v) && k == key) {
+            line = k + "=" + std::to_string(std::max(0, value));
+            updated = true;
+            break;
+        }
+    }
+
+    if (!updated) {
+        lines.push_back(key + "=" + std::to_string(std::max(0, value)));
+    }
+
+    std::ofstream out(path);
+    for (const auto &line : lines) {
+        out << line << "\n";
+    }
+}
+
+std::string ToolConfigStore::readAll(const std::filesystem::path &path) const {
+    if (path.empty() || !std::filesystem::exists(path)) {
+        return {};
+    }
+    std::ifstream in(path);
+    std::ostringstream ss;
+    ss << in.rdbuf();
+    return ss.str();
+}
+
+void ToolConfigStore::writeAll(const std::filesystem::path &path, const std::string &content) const {
+    if (path.empty()) {
+        return;
+    }
+    std::ofstream out(path);
+    out << content;
+}