feat(kanban): deadlines en cards (context menu, badges, calendario, history)

- migration 009 + columna deadline TEXT en cards
- backend: CardPatch.HasDeadline, eventos deadline_set/deadline_cleared
- KanbanCard: menu derecho con DatePicker, badge countdown con colores por ratio (azul>=50%, amarillo<50%, rojo<10%, red.9 overdue)
- App.tsx: filtro "Con deadline", handleSetCardDeadline optimista, jump-to-card + highlight
- CalendarView: popover por dia con seq_num + titulo, click navega a card en tablero
- HistoryModal: render eventos deadline_set/deadline_cleared
- .gitignore: *.log

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

run.sh

@@ -1,11 +1,11 @@
 #!/usr/bin/env bash
 # Lanza backend Go (puerto 8095) + frontend Vite dev (puerto 5180) en paralelo.
 # Vite hace proxy /api -> 8095, asi que abrir http://localhost:5180
-
 set -euo pipefail
 
-SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
-cd "$SCRIPT_DIR"
+ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+BACK_DIR="$ROOT/backend"
+FRONT_DIR="$ROOT/frontend"
 
 PORT_BACK="${PORT_BACK:-8095}"
 PORT_FRONT="${PORT_FRONT:-5180}"
@@ -22,25 +22,25 @@ cleanup() {
 trap cleanup INT TERM EXIT
 
 # 1. Build backend si no existe o si los .go/.sql son mas nuevos que el binario
-if [[ ! -x ./kanban ]] || [[ -n "$(find . -maxdepth 3 \( -name '*.go' -o -name '*.sql' \) -newer ./kanban 2>/dev/null)" ]]; then
+if [[ ! -x "$BACK_DIR/kanban" ]] || [[ -n "$(find "$BACK_DIR" -maxdepth 3 \( -name '*.go' -o -name '*.sql' \) -newer "$BACK_DIR/kanban" 2>/dev/null)" ]]; then
     echo ">>> Building backend..."
-    CGO_ENABLED=1 go build -tags fts5 -o kanban .
+    (cd "$BACK_DIR" && CGO_ENABLED=1 go build -tags fts5 -o kanban .)
 fi
 
 # 2. Asegurar deps frontend
-if [[ ! -d frontend/node_modules ]]; then
+if [[ ! -d "$FRONT_DIR/node_modules" ]]; then
     echo ">>> Installing frontend deps..."
-    (cd frontend && pnpm install)
+    (cd "$FRONT_DIR" && pnpm install)
 fi
 
 # 3. Lanzar backend
 echo ">>> Backend  http://localhost:$PORT_BACK  (db=$DB_PATH)"
-./kanban --port "$PORT_BACK" --db "$DB_PATH" &
+(cd "$BACK_DIR" && ./kanban --port "$PORT_BACK" --db "$DB_PATH") &
 BACK_PID=$!
 
 # 4. Lanzar frontend (Vite con HMR + proxy a backend)
 echo ">>> Frontend http://localhost:$PORT_FRONT  (HMR)"
-(cd frontend && pnpm dev --port "$PORT_FRONT" --strictPort) &
+(cd "$FRONT_DIR" && pnpm dev --port "$PORT_FRONT" --strictPort) &
 FRONT_PID=$!
 
 echo ""