feat(dashboard): add rules management panel

[evagundan]

Summary

Add a new "Rules" tab to the home dashboard sidebar, allowing users to view and manage their automation rules.

Motivation

Currently, rules can only be managed through the CLI (miloco-cli) or the Agent. Adding a visual rules panel to the dashboard gives users a quick overview of their configured rules and the ability to enable/disable them or trigger them manually — without needing to open a terminal.

Changes

New Files

• web/src/components/RuleListPanel.tsx — Main component displaying rule cards
• web/src/i18n/locales/zh/rules.json — Chinese translations
• web/src/i18n/locales/en/rules.json — English translations

Modified Files

• web/src/lib/types.ts — Add Rule, RuleMode, RuleLifecycle, RuleAction, RuleCondition type definitions
• web/src/api/real.ts — Add realListRules, realToggleRule, realTriggerRule API functions
• web/src/api/index.ts — Export listRules, toggleRule, triggerRule functions
• web/src/components/Sidebar.tsx — Add "rules" tab to navigation, add IconRules SVG icon
• web/src/App.tsx — Wire up rules data fetching and render RuleListPanel for the rules tab
• web/src/i18n/locales/zh/nav.json — Add nav.rules / nav.rulesHint keys
• web/src/i18n/locales/en/nav.json — Add nav.rules / nav.rulesHint keys

Features

The rules panel shows each configured rule as a card with:

• Rule name with tag badge (e.g. [study_focus])
• Mode badge: "事件" (Event) or "状态" (State)
• Condition query text (truncated to 2 lines)
• Duration/ratio info when configured (e.g. "180s / 60%")
• Toggle switch to enable/disable the rule
• Trigger button to manually fire the rule for testing

Loading skeleton and empty state are also handled.

Testing

• Verified the panel renders correctly with the user's 3 existing study focus rules
• Toggle and trigger buttons call the correct backend API endpoints
• i18n translations work for both zh and en locales

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[github-actions]

👋 感谢提交 PR @evagundan！维护者会尽快 review。

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