feat: plugin framework hardening — dynamic UI, persistent state, enriched metadata

[fatherlinux]

Summary

• Plugin METADATA now declares capability flags: has_tab, has_timer_types, has_counts, has_sync, has_import_export, has_history_decorators
• Plugin toggle state persists across container restarts via IndexedDB
• Extension tab visibility is metadata-driven (no more hardcoded 'todos' checks)
• Plugin cards in Settings show dynamic count badges and import/export buttons
• Type dropdown queries active plugins with has_timer_types via a generic provider loop
• Edit modal correctly shows linked pomodoro types (e.g. "To-do") that aren't in the standard type list
• All views (History, weekly overview, Type dropdown) refresh when plugins are toggled

Closes #101

Test plan

• Toggle Todos off → To-do tab hides, Type dropdown drops todo items, History drops annotations
• Toggle Todos on → everything repopulates immediately
• Edit a todo-linked pomodoro → Type shows "To-do" (not blank)
• Plugin cards show count badge and import/export buttons
• 133 existing tests pass

🤖 Generated with Claude Code

[gemini-code-assist]

Code Review

This pull request implements the "Plugin Framework Hardening" specification, introducing persistent plugin states via IndexedDB, dynamic rendering of plugin settings cards, and capability-driven extension tabs. However, the current implementation still contains several hardcoded references to the 'todos' plugin in the frontend. The review feedback focuses on decoupling this logic by introducing a generic frontend PluginUI registry to dynamically manage counts, timer type providers, and CSV import/export handlers, fully aligning the code with the architectural goals of the specification.

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[gemini-code-assist]

To adhere to the plugin framework design goals (SC-004 and User Story 5), avoid hardcoding plugin-specific logic like plugin.id === 'todos'. Instead, query the count dynamically from the PluginUI registry.

Suggested change

	const count = plugin.id === 'todos' ? (await Storage.getTodos()).length : 0;
	const count = await PluginUI.getCount(plugin.id);

[gemini-code-assist]

Instead of hardcoding the 'todos' plugin check, dynamically retrieve the timer type provider from the PluginUI registry. This allows any active plugin with has_timer_types to seamlessly inject its items.

Suggested change

	for (const plugin of timerTypePlugins) {
	if (plugin.id === 'todos') {
	const lists = await Storage.getTodoLists();
	const todos = (await Storage.getTodos()).filter(t => t.status === 'pending');
	_timerTypeProviders.push({ plugin, lists, todos });
	}
	}
	for (const plugin of timerTypePlugins) {
	const providerFn = PluginUI.getTimerTypeProvider(plugin.id);
	if (providerFn) {
	const data = await providerFn();
	_timerTypeProviders.push({ plugin, ...data });
	}
	}

[gemini-code-assist]

Remove the hardcoded check for 'todos' here as well. Checking for the presence of provider.lists makes the rendering logic generic and reusable for other list-based plugins.

Suggested change

	for (const provider of _timerTypeProviders) {
	if (provider.plugin.id === 'todos' && provider.lists.length > 0) {
	html += '<option disabled>──────────</option>';
	for (const list of provider.lists) {
	const count = provider.todos.filter(t => t.list_id === list.id).length;
	if (count === 0) continue;
	html += `<option value="list:${list.id}">📋 ${escapeHtml(list.name)} (${count})</option>`;
	}
	}
	}
	for (const provider of _timerTypeProviders) {
	if (provider.lists && provider.lists.length > 0) {
	html += '<option disabled>──────────</option>';
	for (const list of provider.lists) {
	const count = provider.todos.filter(t => t.list_id === list.id).length;
	if (count === 0) continue;
	html += `<option value="list:${list.id}">📋 ${escapeHtml(list.name)} (${count})</option>`;
	}
	}
	}

[gemini-code-assist]

Instead of searching specifically for the 'todos' provider, find the provider that contains the selected list ID. This decouples the cascading dropdown logic from any specific plugin ID.

Suggested change

	const todosProvider = _timerTypeProviders.find(p => p.plugin.id === 'todos');
	if (!todosProvider) return;
	const listTodos = todosProvider.todos.filter(t => t.list_id === listId);
	const list = todosProvider.lists.find(l => l.id === listId);
	const label = list ? list.name : 'To-do';
	const provider = _timerTypeProviders.find(p => p.lists && p.lists.some(l => l.id === listId));
	if (!provider) return;
	const listTodos = provider.todos.filter(t => t.list_id === listId);
	const list = provider.lists.find(l => l.id === listId);

[gemini-code-assist]

To fully implement the frontend PluginUI registry specified in User Story 5 and FR-008, define a generic PluginUI registry here and register the built-in todos plugin contributions. This completely removes the hardcoded checks and makes the framework extensible for future plugins.

        // ── PluginUI Registry ──────────────────────────────────────
        const PluginUI = {
            _countProviders: {},
            _timerTypeProviders: {},
            _csvHandlers: {},
            registerCountProvider: function(id, fn) { this._countProviders[id] = fn; },
            registerTimerTypeProvider: function(id, fn) { this._timerTypeProviders[id] = fn; },
            registerCSVHandlers: function(id, expFn, impFn) { this._csvHandlers[id] = { export: expFn, import: impFn }; },
            getCount: async function(id) { return this._countProviders[id] ? await this._countProviders[id]() : 0; },
            getTimerTypeProvider: function(id) { return this._timerTypeProviders[id]; },
            exportCSV: function(id) { if (this._csvHandlers[id]) return this._csvHandlers[id].export(); },
            importCSV: function(id, input) { if (this._csvHandlers[id]) return this._csvHandlers[id].import(input); }
        };

        // Register built-in todos plugin UI contributions
        PluginUI.registerCountProvider('todos', async () => (await Storage.getTodos()).length);
        PluginUI.registerTimerTypeProvider('todos', async () => {
            const lists = await Storage.getTodoLists();
            const todos = (await Storage.getTodos()).filter(t => t.status === 'pending');
            return { lists, todos };
        });
        PluginUI.registerCSVHandlers('todos', exportTodoCSV, importTodoCSV);

        function exportPluginCSV(pluginId) {
            return PluginUI.exportCSV(pluginId);
        }
        function importPluginCSV(pluginId, input) {
            return PluginUI.importCSV(pluginId, input);
        }