perf(app): defer the closed prompt menu

[Itsnotaka]

Summary:

• split the closed composer prompt menu behind one cached import
• start loading only when a live slash or mention trigger exists
• correct the startup graph check to ignore compiler-erased type-only edges

Performance:

• eager Home source: 909,275 to 890,793 bytes (-2.03%)
• initial JS: 1,582,460 to 1,571,168 bytes (-0.71%)
• pooled Electron window-ready: 4,413 to 4,383 ms
• React initial render: 2.2 ms on both sides; commit-to-frame 6.6 to 6.7 ms

Verification:

• startup review guard passes and Vite reaches ready
• focused resource test passes
• production app build passes
• typecheck, architecture, design, and React review retain only documented main-branch findings

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Project	Deployment	Actions	Updated (UTC)
honk-marketing	Ready	Preview	Aug 4, 2026 7:58pm