[ChuckBuilds]

Stage 1 of moving the web UI to native ES modules with one schema-driven form model (roadmap theme T7, ranked opportunity 12). This is the namespace refactor that comes before any split of plugins_manager.js. It is small on purpose: it adds the pattern and proves it on one page and on the form model, and it changes no other page.

What's in it

1. Module skeleton (web_interface/static/v3/js/core/)

There is no bundler, and nothing is built on the Pi; it serves the files as they are.

File	What it does
boot.js	The entry point. base.html loads it last, with <script type="module">. It registers pages with lazy loaders and keeps the old globals as aliases.
registry.js	The page lifecycle. A partial whose root has data-page="<name>" gets init(root, ctx) once when htmx swaps it in. It gets destroy(root, ctx) on htmx:beforeSwap (unless the swap was vetoed) or when its root has left the document. ctx.signal is aborted on destroy, so listeners and fetches registered with it clean themselves up. Mounting is idempotent. LEDMatrix.pages.refresh() covers loadPartialDirect, which inserts HTML without htmx.
api.js	A fetch wrapper. It returns the JSON envelope and throws ApiError (status, body, network, loginRequired). AbortError passes through. It calls window.fetch at call time, so the #683 login wrapper in base.html still redirects, and it turns that 401 into a quiet loginRequired error.
facade.js	window.LEDMatrix (api, pages, notify, escape, widgets, deprecate) and the deprecated aliases, which warn once.

Serving changes in app.py:

• .js and .mjs are pinned to text/javascript, because module scripts require a JavaScript MIME type.
• A static .js request without ?v= now gets Cache-Control: no-cache (a 304 when unchanged) instead of being cached as immutable for a year. Modules import each other by relative URL, and that URL never carries the version. Versioned URLs keep the long cache.

2. Reference page: Cache

• cache.html no longer has its 163-line inline script. Its root is data-page="cache".
• js/pages/cache.js runs the page and is loaded the first time the tab opens. Rows are built with textContent, and Delete uses one delegated listener.
• window.deleteCacheFile stays as a deprecated alias.

3. Form model foundation (src/plugin_system/field_model.py)

build_field_model(schema, config, plugin_id) walks a schema the way the render_field macro does. It returns one JSON tree, which covers:

• each field's path, label, help, widget, value, default, constraints, options and secret flag;
• the exact form controls the macro posts (inputs);
• the JS widget it mounts (mount).

It handles every branch of the macro: checkbox, toggle-switch, select, number, slider, number-input, file-upload (array and string), checkbox-group, google-calendar-picker, day-selector, custom-feeds, array-table, color-picker, comma text, text, json-file-manager, the string JS widgets, plugin-supplied widgets, schedule-picker, time-range, style-editor (with its fallback), nested sections, legacy-boolean objects, hidden fields, the advanced tier and schemaless configs. Rendering does not change yet.

4. docs/WEB_FRONTEND_ARCHITECTURE.md

The doc covers:

• the target layout;
• the lifecycle and facade contracts;
• serving modules from the Pi;
• the migration order, smallest page first and plugins_manager.js last;
• the flag-gated switch to model rendering and JSON submit, including the save-parity test that gates it;
• which JS suites cover each step.

Parity result

test/test_field_model_parity.py renders the real macro and parses the <form>. It records every named control as (name, type, submitted value, checked, options) in document order, and every widget script as (widget, name, JSON value). It then checks both lists against the model, and checks that the set of posted names is identical.

Each schema is rendered twice: once with nothing stored, and once with the config the route really renders (defaults merged, secrets masked).

Schemas covered locally: 49 files plus 2 synthetic.

• All 46 in the ledmatrix-plugins monorepo (read-only).
• plugin-repos/starlark-apps and plugin-repos/web-ui-info.
• test/fixtures/plugins/ci-fixture-plugin.
• A synthetic schema that reaches every macro branch, and a schemaless config.

That is 102 cases, 8,915 form controls and 291 widget mounts compared. No mismatches.

In CI the monorepo isn't checked out, so the synthetic schema keeps every branch covered (test_every_macro_branch_is_reached). Locally, set LEDMATRIX_MONOREPO_PLUGINS, or keep a sibling ../ledmatrix-plugins checkout.

I mutation-checked the test. Each of these model bugs makes it fail:

• dropping the checkbox-group sentinel;
• dropping the table time default;
• choosing the first <select> match instead of the last;
• dropping the number None quirk;
• missing all-hidden objects.

The model reproduces these existing macro quirks on purpose. They are for the renderer to fix later:

• 83 number fields with a null default render value="None".
• blackjack's x-widget: "color" and stock-news' tag-input fall back to a comma-separated text box.
• of-the-day's ["null", ...]-typed file_manager is drawn as a text box.
• 11 objects that have no properties render nothing.

Tests

• JS (node test/js/run_all.js with REQUIRE_DOM=1 against a local emulator server): all 19 suites pass. New suites:
  • unit/test_page_registry.js (31 checks): the lifecycle.
  • unit/test_core_modules.js (30): api and facade.
  • dom/test_cache_page.js (31): real partial and real API shape. After five swaps, one Refresh makes exactly one request; a cancelled in-flight request draws nothing; hostile keys stay text; delete, empty, error, network and login states.
  • test_html_escaping.js drops the cache.html escaper, which no longer exists.
• Python:
  • test/web_interface/test_es_modules.py covers MIME type, no-cache vs immutable, boot.js loading last, import resolution, the registered page ↔ module ↔ partial mapping, and that converted partials have no <script>.
  • The parity test.
  • scripts/build_css.py --check passes (no new utility classes).
  • field_model.py is added to the mypy ratchet, which is clean (79 modules).
• Full suite vs a baseline worktree of origin/main: the same 68 FAILED/ERROR test IDs on both (62 failed + 6 errors, all pre-existing on this Windows host); nothing new fails, nothing is fixed. Branch: 6,858 passed vs 6,826 on main (+32 new tests).
• Browser smoke (dev app in emulator mode, browser pane):
  • Cache, Logs, Operation History, General and Overview were visited ten times in turn.
  • The cache, general and logs panels were each re-swapped five more times through htmx.ajax.
  • Result: one mounted cache page, one /api/v3/cache/list request per swap and exactly one per Refresh click, and no errors from the app's own code. The same run against an origin/main server gave identical request counts.
  • Two kinds of console noise showed up, and the same run on origin/main showed both:
    • The pane was hidden, which freezes requestAnimationFrame, so Alpine logs cancelled x-transition promise rejections.
    • /api/v3/logs returns 503 because Windows has no journalctl.

Not in this PR

• No other page is converted.
• Plugin config forms still render from the macro.
• The model endpoint, the renderer and the JSON-submit flag are stages that follow, described in the doc.

🤖 Generated with Claude Code

Summary by CodeRabbit

• New Features
  • Added the foundation for loading Web UI pages as native modules, including shared API access and page lifecycle management.
  • Added a structured model for plugin configuration forms, covering field types, defaults, and options.
• Bug Fixes
  • Improved Cache page handling for loading, errors, deletion, and stale requests. Cache values are rendered as text.
• Documentation
  • Added guidance on the Web UI architecture and running its JavaScript tests.

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Configuration used: Organization UI

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Run ID: 72663533-f81b-4daa-8d2a-151aefb062b4

📥 Commits

Reviewing files that changed from the base of the PR and between a0ca974 and 51b6577.

📒 Files selected for processing (2)

• test/js/dom/test_cache_page.js
• web_interface/static/v3/js/pages/cache.js

📝 Walkthrough

Walkthrough

The changes add a native ES-module runtime and migrate the Cache page from an inline script to a page module. They also add a JSON plugin configuration field model, parity tests, JavaScript serving rules, and frontend architecture documentation.

Changes

Web UI modules and Cache page

Layer / File(s)	Summary
Module runtime and serving contract web_interface/static/v3/js/core/*, web_interface/app.py, web_interface/templates/v3/base.html, test/js/unit/*, test/web_interface/test_es_modules.py, docs/WEB_FRONTEND_ARCHITECTURE.md, CHANGELOG.md	Adds an API wrapper, window.LEDMatrix facade, and page registry. The boot module starts the registry and registers the Cache page loader. JavaScript modules receive a pinned MIME type and unversioned scripts receive no-cache. Tests cover module serving, API behavior, facade behavior, and page lifecycle.
Cache page module web_interface/static/v3/js/pages/cache.js, web_interface/templates/v3/partials/cache.html, test/js/dom/test_cache_page.js, test/js/run_all.js	Moves cache loading, rendering, and deletion from the partial’s inline script into a page module. The module uses the API wrapper and registry lifecycle. DOM tests cover rendering, refreshes, deletion, errors, and cancellation.

Plugin configuration field model

Layer / File(s)	Summary
Field model and macro parity src/plugin_system/field_model.py, test/test_field_model_parity.py, mypy-clean.txt, docs/WEB_FRONTEND_ARCHITECTURE.md, docs/HOW_TO_RUN_TESTS.md	Adds a JSON-serializable model for schema-backed and schemaless plugin form fields, controls, and widget mounts. Adds tests that compare model output with the existing form macro across discovered schemas.

Estimated code review effort: 4 (Complex) | ~45 minutes

Change: Feature

Sequence Diagram(s)

sequenceDiagram
  participant Browser
  participant Flask
  participant PageRegistry
  participant CachePage as cache.js
  participant API as api.js
  Browser->>Flask: Request Cache partial and boot module
  Flask-->>Browser: Return partial and JavaScript modules
  Browser->>PageRegistry: Start registry after module load
  PageRegistry->>CachePage: Lazy-load module for data-page root
  CachePage->>API: Request cache list
  API->>Flask: Fetch cache endpoint
  Flask-->>API: Return JSON response
  API-->>CachePage: Return parsed response
  CachePage-->>Browser: Render cache entries

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🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 38.71% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 124 functions across 17 files. (10 skippe…	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely summarizes the main changes: the ES-module page lifecycle and the schema field model introduced in stage 1.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

Full details: Docstring Coverage

Explanation

Docstring coverage is 38.71% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 124 functions across 17 files. (10 skipped: 10 unsupported.)

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🟢 Metrics 457 complexity · 0 duplication

Metric	Results
Complexity	457
Duplication	0

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Actionable comments posted: 1

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• 🪄 Fix CodeRabbit comments on this PR

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Inline comments:
Review comments at @web_interface/static/v3/js/pages/cache.js:
- Around line 110-115: Update the cache-directory rendering in render() so the
`text-gray-500` class is removed when `data.cache_dir` is present, while
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Configuration used: Organization UI

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Plan: Advanced

Run ID: 731334d7-2571-4a90-8ca1-c193ff281f1b

📥 Commits

Reviewing files that changed from the base of the PR and between dfd67c7 and a0ca974.

📒 Files selected for processing (27)

• CHANGELOG.md
• docs/HOW_TO_RUN_TESTS.md
• docs/README.md
• docs/WEB_FRONTEND_ARCHITECTURE.md
• mypy-clean.txt
• src/plugin_system/field_model.py
• test/js/README.md
• test/js/dom/test_cache_page.js
• test/js/run_all.js
• test/js/unit/test_core_modules.js
• test/js/unit/test_html_escaping.js
• test/js/unit/test_page_registry.js
• test/test_field_model_parity.py
• test/web_interface/test_es_modules.py
• web_interface/app.py
• web_interface/static/v3/js/app-early.js
• web_interface/static/v3/js/app-shell.js
• web_interface/static/v3/js/core/api.js
• web_interface/static/v3/js/core/boot.js
• web_interface/static/v3/js/core/facade.js
• web_interface/static/v3/js/core/package.json
• web_interface/static/v3/js/core/registry.js
• web_interface/static/v3/js/pages/cache.js
• web_interface/static/v3/js/pages/package.json
• web_interface/static/v3/plugins_manager.js
• web_interface/templates/v3/base.html
• web_interface/templates/v3/partials/cache.html

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