feat: forum rich-text editor, emoji picker, mentions, discover nav, feed, uploads, profile

Forum:
- TipTap WYSIWYG editor with full toolbar
- @emoji-mart/react emoji picker (consistent with tweets)
- @mention autocomplete with user search API
- Fix PHP 8.4 parse errors in Blade templates
- Fix thread data display (paginator items)
- Align forum page widths to max-w-5xl

Discover:
- Extract shared _nav.blade.php partial
- Add missing nav links to for-you page
- Add Following link for authenticated users

Feed/Posts:
- Post model, controllers, policies, migrations
- Feed page components (PostComposer, FeedCard, etc)
- Post reactions, comments, saves, reports, sharing
- Scheduled publishing support
- Link preview controller

Profile:
- Profile page components (ProfileHero, ProfileTabs)
- Profile API controller

Uploads:
- Upload wizard enhancements
- Scheduled publish picker
- Studio status bar and readiness checklist

resources/js/components/upload/steps/Step1FileUpload.jsx

@@ -1,9 +1,6 @@
 import React from 'react'
 import UploadDropzone from '../UploadDropzone'
 import ScreenshotUploader from '../ScreenshotUploader'
-import UploadProgress from '../UploadProgress'
-import { machineStates } from '../../../hooks/upload/useUploadMachine'
-import { getProcessingTransparencyLabel } from '../../../lib/uploadUtils'
 
 /**
  * Step1FileUpload
@@ -28,24 +25,9 @@ export default function Step1FileUpload({
   screenshotErrors,
   screenshotPerFileErrors,
   onScreenshotsChange,
-  // Machine state
+  // Machine state (passed for potential future use)
   machine,
-  showProgress,
-  onRetry,
-  onReset,
 }) {
-  const processingTransparencyLabel = getProcessingTransparencyLabel(
-    machine.processingStatus,
-    machine.state
-  )
-
-  const progressStatus = (() => {
-    if (machine.state === machineStates.ready_to_publish) return 'Ready'
-    if (machine.state === machineStates.uploading) return 'Uploading'
-    if (machine.state === machineStates.processing || machine.state === machineStates.finishing) return 'Processing'
-    return 'Idle'
-  })()
-
   return (
     <div className="bg-panel/80 backdrop-blur rounded-2xl shadow-xl shadow-black/40 ring-1 ring-white/10 p-6 space-y-5">
       {/* Step header */}
@@ -107,23 +89,6 @@ export default function Step1FileUpload({
         looksGoodText="Looks good"
         onFilesChange={onScreenshotsChange}
       />
-
-      {/* Progress panel */}
-      {showProgress && (
-        <UploadProgress
-          title="Upload progress"
-          description="Upload and processing status"
-          status={progressStatus}
-          progress={machine.progress}
-          state={machine.state}
-          processingStatus={machine.processingStatus}
-          isCancelling={machine.isCancelling}
-          error={machine.error}
-          processingLabel={processingTransparencyLabel}
-          onRetry={onRetry}
-          onReset={onReset}
-        />
-      )}
     </div>
   )
 }