fix: revert leftover Project→Client mislabels, drop tracked .env.backfill

Rename in 91045a1 was only partially reverted by later commits, leaving
~20 UI spots calling the project entity "Client" while table headers
already said "Project". Reverted all of them plus the /clients/:id
route (now /projects/:id canonical again, nothing was live yet).

Also: stop tracking .env.backfill (had a live admin password/token
committed - rotate those credentials), remove stale pre-redesign
layout.md superseded by REDESIGN-LAYOUT2.md.

src/components/Layout.jsx

@@ -334,9 +334,9 @@ export default function Layout({ children, loading = false }) {
                   {!hasResults && <div className="site-header-dropdown-empty">No results for "{searchQuery}"</div>}
                   {searchResults.projects.length > 0 && (
                     <>
-                      <div className="site-header-dropdown-group">Clients</div>
+                      <div className="site-header-dropdown-group">Projects</div>
                       {searchResults.projects.map(p => (
-                        <div key={p.id} className="site-header-dropdown-item" onMouseDown={() => { navigate(`/clients/${p.id}`); setSearchQuery(''); setSearchOpen(false); }}>
+                        <div key={p.id} className="site-header-dropdown-item" onMouseDown={() => { navigate(`/projects/${p.id}`); setSearchQuery(''); setSearchOpen(false); }}>
                           <span className="nav-icon" style={{ opacity: 0.6 }}>{ICONS.projects}</span>
                           {p.name}
                         </div>

src/components/RequestForm.jsx

@@ -242,12 +242,12 @@ export default function RequestForm({
           </div>
         ) : <div />}
         <div className="form-group">
-          <label style={modalLabelStyle}>Client {!lockedFields.includes('project') && '*'}</label>
+          <label style={modalLabelStyle}>Project {!lockedFields.includes('project') && '*'}</label>
           {lockedFields.includes('project') ? (
             <input value={form.project} disabled style={{ ...modalInputStyle, opacity: 0.5, cursor: 'not-allowed' }} />
           ) : isTypingProject ? (
             <div style={{ display: 'flex', gap: 8 }}>
-              <input type="text" placeholder="Enter client name..." value={newProjectName} onChange={e => setNewProjectName(e.target.value)} onKeyDown={e => { if (e.key === 'Enter') { e.preventDefault(); handleAddProject(); } }} autoFocus style={{ ...modalInputStyle, flex: 1 }} />
+              <input type="text" placeholder="Enter project name..." value={newProjectName} onChange={e => setNewProjectName(e.target.value)} onKeyDown={e => { if (e.key === 'Enter') { e.preventDefault(); handleAddProject(); } }} autoFocus style={{ ...modalInputStyle, flex: 1 }} />
               <button type="button" className="btn btn-outline" onClick={handleAddProject} disabled={!newProjectName.trim()}>Add</button>
               <button type="button" className="btn btn-outline" onClick={() => { setIsTypingProject(false); setNewProjectName(''); }}>Cancel</button>
             </div>