feat: Add "Wait for space" and settings toggle

[rngadam]

Adds two new features to the dictation page:

1. A "Wait for space before correction" setting. When enabled (default), the persistent red correction underline on an incorrect word only appears after the user types a space or punctuation. While an incorrect word is being typed, the input box border flashes briefly to provide feedback.

2. A settings panel toggle button. This allows the user to show or hide the settings panel. The panel also automatically collapses when the user clicks into the text input area to begin typing.

[gemini-code-assist]

Summary of Changes

Hello @rngadam, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request enhances the dictation page by adding a new user-configurable setting for correction timing and improving the usability of the settings panel. The 'Wait for space before correction' feature provides a more fluid typing experience by only marking words incorrect after they are completed, with a subtle flash for in-progress errors. The settings panel can now be toggled open/closed and automatically hides when the user starts typing.

Highlights

• New Features: This PR introduces two new features: a 'Wait for space before correction' setting and a toggle button for the settings panel.
• Correction Behavior: The 'Wait for space before correction' setting (enabled by default) delays the persistent red underline for incorrect words until a space or punctuation is typed. While typing an incorrect word, the input box will briefly flash to provide immediate feedback.
• Settings Panel Usability: A new 'Settings' button allows users to show or hide the configuration panel. The panel also automatically collapses when the user clicks into the text input area, improving focus during dictation.

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[gemini-code-assist]

Code Review

I've reviewed your pull request. The new features, 'Wait for space' and the settings panel toggle, are well-implemented and align with the description. The logic for handling word correction is particularly clever. I have one suggestion to improve code maintainability by reducing some duplication. Overall, great work!

[gemini-code-assist]

There's some duplicated code here for marking a word as incorrect. The logic that adds the incorrect class and sets firstErrorFound is repeated in two separate branches.

To improve maintainability and adhere to the DRY (Don't Repeat Yourself) principle, you can refactor this conditional logic. This will make the code more concise and easier to maintain, as any future changes to the 'mark as incorrect' logic will only need to be made in one place.

                    if (waitForSpaceCheckbox.checked && !isWordInteractionComplete) {
                        flashIncorrect();
                    } else {
                        span.classList.add('incorrect');
                        if (!firstErrorFound) {
                            firstErrorFound = { input: inputWord, source: sourceWords[index] };
                        }
                    }

[rngadam]

@gemini-code-assist /review

[gemini-code-assist]

Code Review

Thank you for this pull request. The new features for 'Wait for space' and the settings panel toggle are great additions. The refactoring of the hidden mode logic is also a significant improvement, making the code cleaner and easier to maintain. I've found a few areas where we can make further improvements, including a security enhancement and some minor refactoring for better maintainability and user experience. Please see my detailed comments below.

[gemini-code-assist]

This function uses innerHTML to render sourceWords, which can come from user input. This creates a potential Cross-Site Scripting (XSS) vulnerability if a user saves text containing malicious HTML.

To fix this, we should build the DOM nodes programmatically using document.createElement and set their content using textContent, which automatically escapes any HTML.

    textDisplay.innerHTML = ''; // Clear previous content
    if (!sourceWords.length) {
        return;
    }

    const isHidden = hideTextCheckbox.checked;
    // Render words, obscuring if in hidden mode.
    const wordsToRender = isHidden ? sourceWords.map(obscureWord) : sourceWords;

    const fragment = document.createDocumentFragment();
    wordsToRender.forEach((word, index) => {
        const span = document.createElement('span');
        span.className = 'word-span';
        span.textContent = word; // Use textContent to prevent XSS
        fragment.appendChild(span);

        // Add a space after each word except the last one
        if (index < wordsToRender.length - 1) {
            fragment.appendChild(document.createTextNode(' '));
        }
    });
    textDisplay.appendChild(fragment);

[gemini-code-assist]

For better code organization, this new obscureWord helper function should be moved to the // ** Level 1: No Dependencies ** section (around line 47). Since it's a pure function with no external dependencies from this file, placing it with other similar functions will improve code readability and maintainability.

[gemini-code-assist]

The timeout duration 300 is a magic number. It's better to define it as a named constant at the top of the file (e.g., INCORRECT_FLASH_DURATION = 300). This improves readability and makes it easier to manage timing-related values, especially since the corresponding CSS transition has a different duration.

[gemini-code-assist]

When the 'Wait for space' checkbox is toggled, the change should be reflected immediately in the UI. Currently, it only saves the configuration, and the user has to type something for the change to take effect.

By also calling handleContinuousInput(), we can re-evaluate the current input and apply the new display logic instantly, which provides a better user experience.

    waitForSpaceCheckbox.addEventListener('change', () => { 
        saveConfig(); 
        handleContinuousInput(); 
    });