fix: move icons from fontawesome to lucide

[barredterra]

FA no longer ships with frappe. frappe/frappe#40571

[greptile-apps]

Confidence Score: 5/5

This is a straightforward icon-library swap with no functional logic changes; the only behavioural difference is that the download button shows nothing (instead of the placeholder text 'SVG') when frappe.utils.icon is unavailable.

All FontAwesome references are replaced with valid Lucide icon names through a well-guarded helper. The CSS updates are consistent with SVG stroke-based colouring. No data paths, event handlers, or API calls are modified.

No files require special attention.

Sequence Diagram

%%{init: {'theme': 'neutral'}}%%
sequenceDiagram
    participant UI as UI Component
    participant getIcon as getIcon()
    participant frappe as frappe.utils.icon()
    participant Lucide as Lucide SVG

    UI->>getIcon: getIcon(name, size, svgClass, currentColor)
    alt frappe.utils.icon is available
        getIcon->>frappe: frappe.utils.icon(name, size, "", "", svgClass, currentColor)
        frappe->>Lucide: resolve SVG by name
        Lucide-->>frappe: SVG markup
        frappe-->>getIcon: SVG string
        getIcon-->>UI: SVG string (rendered inline)
    else frappe.utils.icon unavailable
        getIcon-->>UI: "" (empty string — no icon shown)
    end

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%%{init: {'theme': 'base', 'themeVariables': {"darkMode": true, "background": "#0d1117", "primaryColor": "#21262d", "primaryTextColor": "#e6edf3", "primaryBorderColor": "#8b949e", "lineColor": "#8b949e", "textColor": "#e6edf3", "edgeLabelBackground": "#161b22", "actorBkg": "#21262d", "actorBorder": "#8b949e", "actorTextColor": "#e6edf3", "actorLineColor": "#8b949e", "signalColor": "#8b949e", "signalTextColor": "#e6edf3", "noteBkgColor": "#373320", "noteBorderColor": "#d4a72c", "noteTextColor": "#f0e6c0", "labelBoxBkgColor": "#21262d", "labelBoxBorderColor": "#8b949e", "labelTextColor": "#e6edf3", "loopTextColor": "#e6edf3", "activationBkgColor": "#30363d", "activationBorderColor": "#8b949e"}}}%%
sequenceDiagram
    participant UI as UI Component
    participant getIcon as getIcon()
    participant frappe as frappe.utils.icon()
    participant Lucide as Lucide SVG

    UI->>getIcon: getIcon(name, size, svgClass, currentColor)
    alt frappe.utils.icon is available
        getIcon->>frappe: frappe.utils.icon(name, size, "", "", svgClass, currentColor)
        frappe->>Lucide: resolve SVG by name
        Lucide-->>frappe: SVG markup
        frappe-->>getIcon: SVG string
        getIcon-->>UI: SVG string (rendered inline)
    else frappe.utils.icon unavailable
        getIcon-->>UI: "" (empty string — no icon shown)
    end

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_{Reviews (2): Last reviewed commit: "fix: move icons from fontawesome to luci..." | Re-trigger Greptile}