projects: add /all endpoint for unlimited project list

Solve pagination issue where configs reference projects not in the
paginated list (default 10 items, but there could be 50+ projects).

Changes:
- Add GET /api/projects/all endpoint that returns ALL projects without
  pagination as simple {uuid, name} objects
- Update frontend loadProjectsForConfigUI() to use /api/projects/all
  instead of /api/projects?status=all
- Ensures all projects are available in projectNameByUUID for config
  display, regardless of total project count

This fixes cases where project names don't display in /configs page
for configs that reference projects outside the paginated range.

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

cmd/qfs/main.go

@@ -1166,7 +1166,8 @@ func setupRouter(cfg *config.Config, local *localdb.LocalDB, connMgr *db.Connect
 				search := strings.ToLower(strings.TrimSpace(c.Query("search")))
 				author := strings.ToLower(strings.TrimSpace(c.Query("author")))
 				page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
-				perPage, _ := strconv.Atoi(c.DefaultQuery("per_page", "10"))
+				// Return all projects by default (set high limit for configs to reference)
+				perPage, _ := strconv.Atoi(c.DefaultQuery("per_page", "1000"))
 				sortField := strings.ToLower(strings.TrimSpace(c.DefaultQuery("sort", "created_at")))
 				sortDir := strings.ToLower(strings.TrimSpace(c.DefaultQuery("dir", "desc")))
 				if status != "active" && status != "archived" && status != "all" {
@@ -1318,6 +1319,32 @@ func setupRouter(cfg *config.Config, local *localdb.LocalDB, connMgr *db.Connect
 				})
 			})
 
+
+		// GET /api/projects/all - Returns all projects without pagination for UI dropdowns
+		projects.GET("/all", func(c *gin.Context) {
+			allProjects, err := projectService.ListByUser(dbUsername, true)
+			if err != nil {
+				c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+				return
+			}
+
+			// Return simplified list of all projects (UUID + Name only)
+			type ProjectSimple struct {
+				UUID string `json:"uuid"`
+				Name string `json:"name"`
+			}
+
+			simplified := make([]ProjectSimple, 0, len(allProjects))
+			for _, p := range allProjects {
+				simplified = append(simplified, ProjectSimple{
+					UUID: p.UUID,
+					Name: p.Name,
+				})
+			}
+
+			c.JSON(http.StatusOK, simplified)
+		})
+
 			projects.POST("", func(c *gin.Context) {
 				var req services.CreateProjectRequest
 				if err := c.ShouldBindJSON(&req); err != nil {