Session 2026-05-28: profile page overhaul, nav fixes, dashboard activity links

- Fix nav links not working from profile page (useEffect infinite re-render via unstable profile object ref)
- Fix nav hover/active: gold icon highlight, no background change; active links non-clickable
- Fix hover layout shift: add border: 1px solid transparent to all interactive elements
- Header icon buttons (search, theme toggle) now highlight gold on hover
- Profile page: replace calendar with activity feed (60/40 grid), add stat cards (tasks completed, active projects, revision requests, submissions)
- Profile card: title field, icon rows for location/email/linkedin, member since + role bottom-right, edit button top-right
- Profile portrait: remove wrapper column, fix left-gap alignment
- Add profiles.title migration
- Dashboard recent activity: name → /profile/{id}, task → /requests/{id} (clickable links)
- Icon-only sidebar with gold active/hover state, pointer-events: none on active links
- layout.md updated with profile page geometry rules

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/components/FileAttachment.jsx

@@ -1,7 +1,7 @@
 import { useState, useRef } from 'react';
 
 const MAX_FILES = 20;
-const MAX_SIZE_MB = 50;
+const MAX_SIZE_MB = 250;
 const MAX_SIZE_BYTES = MAX_SIZE_MB * 1024 * 1024;
 
 const formatSize = (bytes) => {
@@ -74,7 +74,7 @@ export default function FileAttachment({ files, onChange }) {
         onDrop={handleDrop}
         style={{
           border: `2px dashed ${dragging ? 'var(--accent)' : files.length > 0 ? 'var(--accent)' : 'var(--border)'}`,
-          borderRadius: 8, padding: '18px 16px', textAlign: 'center',
+          borderRadius: 4, padding: '18px 16px', textAlign: 'center',
           background: dragging ? 'color-mix(in srgb, var(--accent) 8%, var(--bg))' : 'var(--bg)',
           transition: 'all 0.15s',
         }}
@@ -82,7 +82,7 @@ export default function FileAttachment({ files, onChange }) {
         <input type="file" multiple onChange={handleChange} style={{ display: 'none' }} id="req-file-upload" />
         <label htmlFor="req-file-upload" style={{ cursor: 'pointer' }}>
           <div style={{ fontSize: 22, marginBottom: 4 }}>{dragging ? '📂' : '📎'}</div>
-          <div style={{ fontWeight: 600, fontSize: 13, color: 'var(--text-primary)' }}>
+          <div style={{ fontWeight: 400, fontSize: 13, color: 'var(--text-primary)' }}>
             {dragging
               ? 'Drop files here'
               : files.length > 0
@@ -102,12 +102,12 @@ export default function FileAttachment({ files, onChange }) {
           {files.map((file, i) => (
             <div key={i} style={{
               display: 'flex', alignItems: 'center', justifyContent: 'space-between',
-              padding: '7px 12px', background: 'var(--card-bg)', borderRadius: 8, border: '1px solid var(--border)',
+              padding: '7px 12px', background: 'var(--card-bg)', borderRadius: 4, border: '1px solid var(--border)',
             }}>
               <div style={{ display: 'flex', alignItems: 'center', gap: 8 }}>
                 <span>📄</span>
                 <div>
-                  <div style={{ fontSize: 13, fontWeight: 600 }}>{file.name}</div>
+                  <div style={{ fontSize: 13, fontWeight: 400 }}>{file.name}</div>
                   <div style={{ fontSize: 11, color: 'var(--text-muted)' }}>{formatSize(file.size)}</div>
                 </div>
               </div>