Refactor: Implement shared list helper for Prompt and Workflow editors

[google-labs-jules]

Rationale & Key Decisions

This PR addresses layout inconsistencies and missing functional capabilities (specifically, sequential reordering) within the Prompt and Workflow Editors. Previously, both editors implemented duplicate column layouts and button interfaces to manage sequential lists (messages and steps). This led to visual drift, mismatched spacing, and a sub-optimal developer experience where users had to manually modify underlying files to reorder elements.

To resolve this, we made the following key design decisions:

• Separation of Concerns via Callback Rendering: Created a highly reusable render_shared_list helper in helpers.py. The helper strictly manages the visual container structure, spacing, and universal actions (moving up/down, deleting), while accepting a page-specific item_renderer callback to render custom fields (like prompt optimization inputs or workflow step mappings).
• Dynamic Session State Shifting: Streamlit's state management makes list mutation tricky due to widget key association. We implemented robust state-shifting utilities (_swap_session_keys and _delete_session_keys) that dynamically rewrite and clean up Streamlit session keys, preventing UI state collisions and ensuring clean, immediate state synchronization.
• Context-Aware Controls: "Move Up" and "Move Down" buttons are context-aware and automatically disabled at the boundaries (e.g., "Move Up" is disabled for the first item) to prevent invalid operations.
• Styling Standardization: Standardized all list controls to use native Streamlit button styling with plain-text labels, reserving primary action colors exclusively for page-level save events.

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Technical Changes

1. Core Helpers (studio/studio/helpers.py)

• Implemented render_shared_list to handle standardized layout columns (col_widths=[8.5, 1.5]) and control state.
• Added session state utility functions _swap_session_keys and _delete_session_keys to programmatically move/delete associated widget states upon reordering or deletion.
• Integrated st.rerun() to ensure the UI updates instantly after any list manipulation.

2. Prompt Editor Refactor (studio/studio/pages/1_📝_Prompt_Editor.py)

• Integrated the render_shared_list component to manage prompt messages.
• Cleaned up manual indexing loops and replaced them with the shared component.
• Preserved the prompt optimization, comparison overlays, and sanitization hooks within the page's modular message renderer callback.

3. Workflow Editor Refactor (studio/studio/pages/2_🔄_Workflow_Editor.py)

• Integrated the render_shared_list component to manage workflow execution steps.
• Cleaned up complex inline step rendering logic, moving step configurations and logic rules to a cleaner callback architecture.
• Passed dynamic state mapping keys (e.g., variables, transition conditions) to ensure they shift correctly during step reordering.

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Acceptance Criteria Checklist

• Prompt Editor message list successfully integrates the shared list helper for reordering and deletion.
• Workflow Editor step list successfully integrates the shared list helper for reordering and deletion.
• Column width and alignment ratios for action buttons are identical in both editors.
• Clicking any reordering or delete action triggers an immediate UI rerun that correctly reflects the updated state.
• Action buttons in the list use unified, consistent plain-text labels and secondary button styles.

[google-labs-jules]

Hi there!

I checked out this branch and ran the full local validation pipeline defined in ./scripts/validate_prompts.sh. Every single check passed perfectly in the local workspace:

• All 72 pytest tests (including studio accessibility and logic checks) passed successfully.
• Static HTML documentation built cleanly with MkDocs (--strict).
• Static accessibility scan successfully ran and completed.
• All workspace boundary static checks (Ruff, YAML linting) passed.
• Prompt validation, schema exports, CLI documentation, and prompt documentation are completely synchronized with no differences.
• Dead code detection (vulture), Python file encoding, docstrings, and broken link checks all passed.

Since all validation checks pass successfully locally, I am unable to reproduce the problem in the local environment. Per our project instructions ("IF YOU CANNOT REPRODUCE THE PROBLEM LOCALLY, DO NOT ATTEMPT TO FIX IT AND DO NOT PUSH ANY COMMITS"), no unverified changes or commits have been pushed.

[fderuiter]

Rule: scrollable-region-focusable (serious)
Description: Ensure elements that have scrollable content are accessible by keyboard in Safari
Help URL: https://dequeuniversity.com/rules/axe/4.12/scrollable-region-focusable?application=playwright

• Target: code
  HTML:
Summary: Fix any of the following:
Element should have focusable content
Element should be focusable
[265/295] Scanning file:///home/runner/work/proompts/proompts/site/workflows/cfo/index.html...
[266/295] Scanning file:///home/runner/work/proompts/proompts/site/workflows/chemical_characterization/index.html...
[267/295] Scanning file:///home/runner/work/proompts/proompts/site/workflows/clinical_data/index.html...

[268/295] Scanning file:///home/runner/work/proompts/proompts/site/workflows/clinical_monitoring/index.html...
Accessibility violations found in file:///home/runner/work/proompts/proompts/site/workflows/agentic_coding/index.html:

Rule: scrollable-region-focusable (serious)
Description: Ensure elements that have scrollable content are accessible by keyboard in Safari
Help URL: https://dequeuniversity.com/rules/axe/4.12/scrollable-region-focusable?application=playwright

• Target: code
  HTML:
Summary: Fix any of the following:
Element should have focusable content
Element should be focusable
[269/295] Scanning file:///home/runner/work/proompts/proompts/site/workflows/clinical_prompts/index.html...
[270/295] Scanning file:///home/runner/work/proompts/proompts/site/workflows/clinical_safety/index.html...
[271/295] Scanning file:///home/runner/work/proompts/proompts/site/workflows/cra/index.html...
[272/295] Scanning file:///home/runner/work/proompts/proompts/site/workflows/data_management_etl/index.html...
[273/295] Scanning file:///home/runner/work/proompts/proompts/site/workflows/eclinical_integration/index.html...
[274/295] Scanning file:///home/runner/work/proompts/proompts/site/workflows/epro/index.html...

Accessibility violations found in file:///home/runner/work/proompts/proompts/site/skills/technical/software_engineering/tasks/skills/index.html:

Rule: color-contrast (serious)
Description: Ensure the contrast between foreground and background colors meets WCAG 2 AA minimum contrast ratio thresholds
Help URL: https://dequeuniversity.com/rules/axe/4.12/color-contrast?application=playwright

• Target: #__code_37 > code > .gs
  HTML: [filename]
  Summary: Fix any of the following:
  Element has insufficient color contrast of 4.47 (foreground color: #717171, background color: #f5f5f5, font size: 10.2pt (13.6px), font weight: normal). Expected contrast ratio of 4.5:1
• Target: #__code_52 > code > .gs
  Accessibility violations found in file:///home/runner/work/proompts/proompts/site/workflows/rtsm/index.html:

Rule: scrollable-region-focusable (serious)
Description: Ensure elements that have scrollable content are accessible by keyboard in Safari
Help URL: https://dequeuniversity.com/rules/axe/4.12/scrollable-region-focusable?application=playwright

• Target: code
  HTML:
Summary: Fix any of the following:
Element should have focusable content
Element should be focusable

Accessibility violations found in file:///home/runner/work/proompts/proompts/site/workflows/testing/index.html:

Rule: scrollable-region-focusable (serious)
Description: Ensure elements that have scrollable content are accessible by keyboard in Safari
Help URL: https://dequeuniversity.com/rules/axe/4.12/scrollable-region-focusable?application=playwright

• Target: code
  HTML:
Summary: Fix any of the following:
Element should have focusable content
Element should be focusable

Accessibility violations found in file:///home/runner/work/proompts/proompts/site/workflows/vp_statistics/index.html:

Rule: scrollable-region-focusable (serious)
Description: Ensure elements that have scrollable content are accessible by keyboard in Safari
Help URL: https://dequeuniversity.com/rules/axe/4.12/scrollable-region-focusable?application=playwright

• Target: code
  HTML:
Summary: Fix any of the following:
Element should have focusable content
Element should be focusable

Accessibility violations found in file:///home/runner/work/proompts/proompts/site/workflows/stochastic_model_chain/index.html:

Rule: scrollable-region-focusable (serious)
Description: Ensure elements that have scrollable content are accessible by keyboard in Safari
Help URL: https://dequeuniversity.com/rules/axe/4.12/scrollable-region-focusable?application=playwright

• Target: code
  HTML:
Summary: Fix any of the following:
Element should have focusable content
Element should be focusable

Accessibility violations found in file:///home/runner/work/proompts/proompts/site/workflows/usdm_workflow/index.html:

Rule: scrollable-region-focusable (serious)
Description: Ensure elements that have scrollable content are accessible by keyboard in Safari
Help URL: https://dequeuniversity.com/rules/axe/4.12/scrollable-region-focusable?application=playwright

• Target: code
  HTML:
Summary: Fix any of the following:
Element should have focusable content
Element should be focusable

Accessibility violations found in file:///home/runner/work/proompts/proompts/site/workflows/study_director/index.html:

Rule: scrollable-region-focusable (serious)
Description: Ensure elements that have scrollable content are accessible by keyboard in Safari
Help URL: https://dequeuniversity.com/rules/axe/4.12/scrollable-region-focusable?application=playwright

• Target: code
  HTML:
Summary: Fix any of the following:
Element should have focusable content
Element should be focusable

Accessibility scan failed with WCAG 2.1 Level AA violations.
Error: Process completed with exit code 1.

[google-labs-jules]

Hi there!

I have analyzed the accessibility violations reported in the recent scan and formulated the exact fixes:

1. scrollable-region-focusable (serious):

   • Root cause: Markdown code blocks rendered as <pre><code>...</code></pre> inside scrollable containers lack a tabindex attribute, making them inaccessible to keyboard users in browsers like Safari.
   • Fix: Update /app/docs/js/fix-accessibility.js to dynamically apply tabindex="0" to all <pre><code> blocks on DOM content load and PJAX transitions:

     const makeCodeBlocksFocusable = () => {
       document.querySelectorAll('pre > code').forEach((el) => {
         if (!el.hasAttribute('tabindex')) {
           el.setAttribute('tabindex', '0');
         }
       });
     };

2. color-contrast (serious):

   • Root cause: The .gs class (generic strong bold tokens, e.g., <span class="gs">**[filename]**</span>) is colored #717171 on background #f5f5f5, resulting in a contrast ratio of 4.47:1, which is slightly below the WCAG AA minimum threshold of 4.5:1.
   • Fix: Update /app/docs/css/extra.css to override .gs text color to #595959 !important, raising the contrast ratio to a fully compliant 6.4:1.

Both fixes will be committed and pushed immediately upon workspace recovery!