feat: replace patient messages tab with pinnable notes

Port the tauri AddNoteModal notes feature into the admin patient case-file,
replacing the mislabeled «پیام‌ها» (SMS log) tab with «یادداشت‌ها».

Backend (src/Patient):
- PatientNote entity + repository (record-scoped, pinned-first ordering)
- CRUD endpoints on PatientController: GET /notes, POST /note,
  PATCH /note/{uuid} (edit body + toggle pin), DELETE /note/{uuid}
- author display name captured server-side from the current user
- migration for patient_notes; docs/api/patient.md updated

Frontend (assets/admin):
- NotesTab: compose box, newest/oldest sort, pinned-first list with
  accent rail + pin/edit/delete, edit modal, confirm-delete, empty state
- tab key/label/icon messages -> notes; onAddNote deep-links the notes tab

Tests: PatientNoteTest (create/list-order/edit/pin/delete/validation/ownership),
PatientDetailPage notes cases (render/empty/pin/create).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/Patient/Entity/PatientNote.php

@@ -0,0 +1,92 @@
+<?php
+
+namespace App\Patient\Entity;
+
+use App\Auth\Entity\User;
+use App\Patient\Repository\PatientNoteRepository;
+use Doctrine\ORM\Mapping as ORM;
+use Symfony\Component\Uid\Uuid;
+
+/**
+ * A personal, pinnable staff note attached to a patient record (the «یادداشت‌ها» tab).
+ * Shared across the staff who own the record; the author's display name is denormalised
+ * so the note survives the author being deleted.
+ */
+#[ORM\Entity(repositoryClass: PatientNoteRepository::class)]
+#[ORM\Table(name: 'patient_notes')]
+#[ORM\Index(columns: ['record_id'], name: 'idx_patient_notes_record')]
+class PatientNote
+{
+    #[ORM\Id]
+    #[ORM\GeneratedValue]
+    #[ORM\Column(type: 'integer')]
+    private ?int $id = null;
+
+    #[ORM\Column(type: 'string', length: 36, unique: true)]
+    private string $uuid;
+
+    #[ORM\ManyToOne(targetEntity: PatientRecord::class)]
+    #[ORM\JoinColumn(name: 'record_id', nullable: false, onDelete: 'CASCADE')]
+    private PatientRecord $record;
+
+    /** متن یادداشت — free-text body. */
+    #[ORM\Column(type: 'text')]
+    private string $body;
+
+    /** یادداشت‌های پین‌شده بالای لیست نشان داده می‌شوند. */
+    #[ORM\Column(type: 'boolean')]
+    private bool $pinned = false;
+
+    /** The staff user who wrote the note; kept for possible audit, nulled if they are removed. */
+    #[ORM\ManyToOne(targetEntity: User::class)]
+    #[ORM\JoinColumn(name: 'created_by', nullable: true, onDelete: 'SET NULL')]
+    private ?User $createdBy = null;
+
+    /** Denormalised author display name (survives user deletion). */
+    #[ORM\Column(name: 'author_name', type: 'string', length: 120, nullable: true)]
+    private ?string $authorName = null;
+
+    #[ORM\Column(name: 'created_at', type: 'integer')]
+    private int $createdAt;
+
+    #[ORM\Column(name: 'updated_at', type: 'integer', nullable: true)]
+    private ?int $updatedAt = null;
+
+    public function __construct(PatientRecord $record, string $body, bool $pinned = false)
+    {
+        $this->uuid      = Uuid::v4()->toRfc4122();
+        $this->record    = $record;
+        $this->body      = $body;
+        $this->pinned    = $pinned;
+        $this->createdAt = time();
+    }
+
+    public function getId(): ?int              { return $this->id; }
+    public function getUuid(): string          { return $this->uuid; }
+    public function getRecord(): PatientRecord { return $this->record; }
+    public function isPinned(): bool           { return $this->pinned; }
+
+    public function setBody(string $body): self { $this->body = $body; $this->touch(); return $this; }
+    public function setPinned(bool $pinned): self { $this->pinned = $pinned; $this->touch(); return $this; }
+
+    public function setAuthor(?User $user, ?string $name): self
+    {
+        $this->createdBy  = $user;
+        $this->authorName = $name;
+        return $this;
+    }
+
+    private function touch(): void { $this->updatedAt = time(); }
+
+    public function toArray(): array
+    {
+        return [
+            'uuid'       => $this->uuid,
+            'body'       => $this->body,
+            'pinned'     => $this->pinned,
+            'author'     => $this->authorName,
+            'created_at' => $this->createdAt,
+            'updated_at' => $this->updatedAt,
+        ];
+    }
+}